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WITH GRATITUDE

Thanks & Credits

Every project is built on the work of many creators, maintainers, and service providers. This page records what we used, how it helped, and our sincere thanks.

SiteY-TEC ForgeThe site itself is a project built from web technology, creative support, and Y-TEC character artwork.
Production toolDesign / implementation support

Astro 7.2.4

withastro / Astro contributors

Used for bilingual static pages, Content Collections, and image optimization.

Usage and terms
Provider / source
Astro 7.2.4
Edits / adjustments
Astro itself is unmodified and generates static HTML at build time. No Astro runtime runs on the public server.
Version scope
Y-TEC Forge 0.1.x
Reviewed
Production toolDesign / implementation support

TypeScript

Microsoft and TypeScript contributors

Used to type-check content structures and bilingual UI data.

Usage and terms
Provider / source
TypeScript
Edits / adjustments
TypeScript itself is unmodified.
Version scope
Y-TEC Forge 0.1.x
Reviewed
Creative serviceDesign / implementation support

Codex（こーでぃー）

OpenAI

Used to support site architecture, implementation, localization, testing, and audits.

Usage and terms
Edits / adjustments
Y-TEC reviews, selects, and edits suggestions and generated output as needed.
Version scope
Y-TEC Forge 0.1.x
Reviewed
Creative serviceDesign / implementation support

ChatGPT（ちゃっぴー）

OpenAI

Used to support ideas, wording, and presentation choices.

Usage and terms
Edits / adjustments
Y-TEC reviews suggestions and adapts them to the site context.
Version scope
Y-TEC Forge 0.1.x
Reviewed
ImageCreated by Y-TEC

ワイテッくん・ちゃっぴー・こーでぃー・てんちゃんのキャラクター画像

Y-TEC

Used throughout site guidance, the brand story, and project page character spots.

Usage and terms
Edits / adjustments
Source artwork was isolated, cropped, spacing-adjusted, and optimized for the web.
Version scope
Y-TEC Forge 0.1.x
Reviewed
Included items
  • ytec-kun/*.png
  • chappy/*.png
  • cody/*.png
  • tenchan/*.png
  • branding/ytec-forge-characters-four.png
  • public/story-assets/story-avatar-chappy-*.webp
  • public/story-assets/story-avatar-ytec-idea.webp
  • public/story-assets/story-avatar-ytec-troubled.webp
  • public/story-assets/story-dialogue-avatar-*.webp
ImageGeneration support

OpenAI image generation — Ten-chan & four-person hero

OpenAI

Used to generate the twenty Ten-chan character poses and the four-person homepage illustration.

Usage and terms
Edits / adjustments
Generated artwork follows existing character references and is reviewed and normalized into 768px transparent assets. The original homepage illustration is retained.
Version scope
Y-TEC Forge — 2026-10-10 character expansion
Reviewed
Included items
  • tenchan/*.png
  • branding/ytec-forge-characters-four.png
AppsKeisaiCredits for the runtime foundations and original Y-TEC notebook-style design behind Keisai.
IconCreated by Y-TEC

アプリアイコンとノート風ビジュアル

Y-TEC

Original visual identity for Keisai, including ruled paper, color themes, and the app icon.

Usage and terms
Edits / adjustments
Created by Y-TEC for the app and optimized for distribution sizes.
Version scope
Keisai 1.6.0
Reviewed
FontCurrently used

Yu Gothic（操作説明書PDF）

Microsoft Windows付属フォント / 字游工房

Windows-supplied Yu Gothic glyph subsets are embedded in the Japanese and English PDF manuals. This is separate from bundling a web font for the app.

Usage and terms
Edits / adjustments
Regular / Bold embedding permissions are checked during generation; only used glyphs are embedded in the PDFs. The original TTC font files are not redistributed.
Version scope
Keisai 1.6.0 manuals
Reviewed
Included items
  • Yu Gothic Regular
  • Yu Gothic Bold
AppsKoyomadoThanks to the projects and creators supporting Koyomado's typography, holidays, and notification sounds.
Runtime libraryCurrently used

@gahojin-inc/holiday-japanese

GAHOJIN, Inc.

Used to display Japanese public holiday names and dates.

Usage and terms
Edits / adjustments
The library itself is unmodified and used by the holiday display feature.
Version scope
Koyomado 1.0.0
Reviewed
Sound effectsCurrently used

UI Sound Effects

Robin Lamb / OpenGameArt.org

Used for the built-in notification sounds Yawaragi, Deep Drop, and Small Bell.

Usage and terms
Provider / source
UI Sound Effects
Terms
CC0 1.0
Edits / adjustments
Volume-adjusted, trimmed to about 10.5 seconds, and faded.
Version scope
Koyomado 1.0.0
Reviewed
Included items
  • やわらぎ
  • 深い雫
  • 小鈴
MusicCurrently used

A Simple Trifle

jestar / OpenGameArt.org

Used for the built-in Morning Dew Piano notification sound.

Usage and terms
Provider / source
A Simple Trifle
Terms
CC0 1.0
Edits / adjustments
Volume-adjusted, trimmed to about 10.5 seconds, and faded.
Version scope
Koyomado 1.0.0
Reviewed
MusicCurrently used

Short kalimba loop

extenz / OpenGameArt.org

Used for the built-in Sunlit Kalimba notification sound.

Usage and terms
Provider / source
Short kalimba loop
Terms
CC0 1.0
Edits / adjustments
Volume-adjusted, trimmed to about 10.5 seconds, and faded.
Version scope
Koyomado 1.0.0
Reviewed
Runtime libraryCurrently used

React / Tauri

Meta Open Source and Tauri Programme contributors

Used for the calendar UI and Windows desktop application runtime.

Usage and terms
Provider / source
React / Tauri
Edits / adjustments
The frameworks themselves are unmodified; Koyomado implements its UI and desktop integration on them.
Version scope
Koyomado 1.0.0
Reviewed
Runtime libraryCurrently used

rrule

Jakub Roztocil / Lars Schöning / rrule contributors

Used for recurring-event rules and date expansion.

Usage and terms
Provider / source
rrule
Edits / adjustments
The library is unmodified and used by the recurring-event logic.
Version scope
Koyomado 1.0.0
Reviewed
Included items
  • rrule 2.8.1
Runtime libraryCurrently used

zip / flate2 / sha2

zip-rs, flate2 and RustCrypto contributors

Used for calendar ZIP backup/restore, compression and SHA-256 verification.

Usage and terms
Provider / source
zip / flate2 / sha2
Edits / adjustments
Libraries are unmodified; full license texts and the dependency inventory are bundled.
Version scope
Koyomado 1.1.0
Reviewed
Included items
  • zip 9.0.4
  • flate2 1.1.9
  • sha2 0.10.9
MusicCurrently used

Carefree / Life of Riley / Wallpaper / Daily Beetle

Kevin MacLeod (incompetech.com)

Background music in the embedded introduction and how-to videos.

Usage and terms
Edits / adjustments
Volume, excerpt length and fades adjusted. The introduction uses Carefree; the guide plays each of the four tracks once in sequence.
Version scope
Koyomado introduction and how-to videos (2026-10-29)
Reviewed
ToolsY-TEC Browser CapsuleCredits for the .NET runtime foundation and app-icon production support.
Runtime libraryCurrently used

.NET 10 / WPF

Microsoft and .NET contributors

Used for the Windows desktop UI and self-contained distribution.

Usage and terms
Provider / source
.NET 10 / WPF
Edits / adjustments
.NET and WPF are unmodified; required runtime components are included for self-contained distribution.
Version scope
Y-TEC Browser Capsule 1.2.1
Reviewed
Detailed notice
Third-party notices
IconGeneration support

OpenAI画像生成サービス

OpenAI

Used to generate the source concept for the app icon representing three browser profiles and a capsule.

Usage and terms
Edits / adjustments
The magenta background was removed, transparency applied, resized, and converted to Windows ICO.
Version scope
Icon created 2026-07-26
Reviewed
FontCurrently used

Windows標準フォント（UI・PDF説明書）

Microsoft Windows / 各書体の権利者

The app UI specifies Segoe UI and Yu Gothic UI, with Consolas for selected fields. The Japanese PDF manual embeds glyph subsets of Meiryo Regular/Bold. Helvetica in the English PDF and Courier in the manual are standard PDF font references, without bundled font files.

Usage and terms
Edits / adjustments
The app UI references Windows fonts on the device. Original TTF/TTC files are not bundled as separate files in the distribution ZIP. PDF glyph embedding is distinguished from redistribution of complete font files.
Version scope
Y-TEC Browser Capsule 1.2.1
Reviewed
Included items
  • UI: Segoe UI / Yu Gothic UI / Consolas
  • Japanese PDF: Meiryo Regular / Bold
  • PDF standard font references: Helvetica / Helvetica Bold / Courier
ToolsY-TEC Data CapsuleCredits for the runtime library and app-icon production support behind Data Capsule.
Runtime libraryCurrently used

Microsoft .NET Framework 4.6.1 / WPF

Microsoft

Runtime foundation for the Windows desktop UI and system API integration.

Usage and terms
Edits / adjustments
.NET Framework and WPF are unmodified and referenced by the application.
Version scope
Y-TEC Data Capsule 1.2.0
Reviewed
Runtime libraryCurrently used

Newtonsoft.Json 13.0.3

James Newton-King

Used for JSON processing of settings and backup information.

Usage and terms
Provider / source
Newtonsoft.Json 13.0.3
Edits / adjustments
The library itself is unmodified and the official binary is redistributed.
Version scope
Y-TEC Data Capsule 1.2.0
Reviewed
Detailed notice
Third-party notices
IconGeneration support

OpenAI画像生成サービス

OpenAI

Used to generate the source app-icon concept combining a blue storage box, mint arrow, and Y shape.

Usage and terms
Edits / adjustments
Background removal, small-size optimization, and Windows ICO conversion were applied.
Version scope
Icon created 2026-07-28
Reviewed
FontCurrently used

Windows標準フォント（UI・PDF説明書）

Microsoft Windows / Morisawa / 各書体の権利者

The app UI specifies Segoe UI, Yu Gothic UI and Meiryo UI. The public PDF manuals embed used glyph subsets of Yu Gothic UI, Segoe UI and Consolas, plus MS Gothic and BIZ UDGothic used for fallback rendering.

Usage and terms
Edits / adjustments
The app UI references Windows fonts on the device. Original TTF/TTC files are not bundled as separate files in the distribution ZIP. PDF glyph embedding is distinguished from redistribution of complete font files.
Version scope
Y-TEC Data Capsule 1.2.0
Reviewed
Included items
  • UI: Segoe UI / Yu Gothic UI / Meiryo UI
  • Japanese PDF: Yu Gothic UI / Consolas / MS Gothic
  • English PDF: Segoe UI / Consolas / BIZ UDGothic / Yu Gothic UI
ToolsY-TEC Wi-Fi CapsuleCredits for the Windows runtime foundation and JSON library used by Wi-Fi Capsule.
Runtime libraryCurrently used

Microsoft .NET Framework / WPF

Microsoft

Runtime foundation for the Windows desktop UI and Wi-Fi profile operations.

Usage and terms
Edits / adjustments
.NET Framework and WPF are unmodified and referenced by the application.
Version scope
Y-TEC Wi-Fi Capsule 1.1.0
Reviewed
Runtime libraryCurrently used

Newtonsoft.Json 13.0.3

James Newton-King

Used for backup JSON processing and redistributed as Newtonsoft.Json.dll.

Usage and terms
Provider / source
Newtonsoft.Json 13.0.3
Edits / adjustments
The library itself is unmodified and the official binary is redistributed.
Version scope
Y-TEC Wi-Fi Capsule 1.1.0
Reviewed
FontCurrently used

Windows標準フォント（UI・PDF説明書）

Microsoft Windows / 各書体の権利者

The app UI specifies Yu Gothic UI and Meiryo UI. The public PDF manuals embed used glyph subsets of Yu Gothic UI in Japanese, Segoe UI in English, and Consolas for code and similar text.

Usage and terms
Edits / adjustments
The app UI references Windows fonts on the device. Original TTF/TTC files are not bundled as separate files in the distribution ZIP. PDF glyph embedding is distinguished from redistribution of complete font files.
Version scope
Y-TEC Wi-Fi Capsule 1.1.0
Reviewed
Included items
  • UI: Yu Gothic UI / Meiryo UI
  • Japanese PDF: Yu Gothic UI / Consolas
  • English PDF: Segoe UI / Consolas
ToolsY-TEC Tsumugi DriveCredits for the compression, key derivation, and Japanese typography components used by the development build.
Runtime libraryCurrently used

Zstandard 1.5.7

Meta Platforms, Inc. and contributors

The audited static compression and decompression profile is linked into product binaries.

Usage and terms
Provider / source
Zstandard 1.5.7
Edits / adjustments
Upstream sources are unmodified and linked using the audited static-build profile.
Version scope
Y-TEC Tsumugi Drive 1.0.0-internal-beta（公開前検証候補 / pre-release validation candidate）
Reviewed
Runtime libraryCurrently used

Argon2 20190702

Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves

Only the portable reference sources required for Argon2id key derivation are used.

Usage and terms
Provider / source
Argon2 20190702
Edits / adjustments
The upstream portable reference sources are unmodified and only the required subset is built.
Version scope
Y-TEC Tsumugi Drive 1.0.0-internal-beta（公開前検証候補 / pre-release validation candidate）
Reviewed
FontCurrently used

LINE Seed JP 20241105

LY Corporation

Regular and Bold font data are embedded in the Windows and Windows PE interfaces.

Usage and terms
Provider / source
LINE Seed JP 20241105
Edits / adjustments
The font data is unmodified; Regular and Bold are embedded.
Version scope
Y-TEC Tsumugi Drive 1.0.0-internal-beta（公開前検証候補 / pre-release validation candidate）
Reviewed
ToolsPrivacy-first Server Log AnalyticsCredits for the server-log analytics foundation and third-party imagery used to identify browsers and operating systems.
Runtime libraryCurrently used

PHP 8.1+

The PHP Group and PHP contributors

Runtime foundation for log imports, daily/monthly aggregation, and the admin dashboard.

Usage and terms
Provider / source
PHP 8.1+
Edits / adjustments
PHP itself is unmodified; analytics processing is implemented on its standard features.
Version scope
Privacy-first Server Log Analytics 0.1.x
Reviewed
Runtime libraryCurrently used

SQLite / PDO SQLite

SQLite Project and PHP contributors

Stores daily and monthly aggregate values without tracking individuals.

Usage and terms
Provider / source
SQLite / PDO SQLite
Edits / adjustments
SQLite itself is unmodified and accessed through PDO SQLite.
Version scope
Privacy-first Server Log Analytics 0.1.x
Reviewed
IconCurrently used

Android robot

Google

Used in the admin dashboard to identify Android traffic.

Usage and terms
Provider / source
Android robot
Edits / adjustments
Displayed at dashboard size with the applicable attribution.
Version scope
Privacy-first Server Log Analytics 0.1.x
Reviewed
IconCurrently used

Firefox logo

Mozilla Foundation

Used in the admin dashboard solely to identify Firefox traffic accurately.

Usage and terms
Provider / source
Firefox logo
Edits / adjustments
The logo shape is unchanged and displayed at dashboard size.
Version scope
Privacy-first Server Log Analytics 0.1.x
Reviewed
GamesLearn with Y-TEC kun ADVWith thanks to the music and sound providers supporting the learning stages.
Sound effectsCurrently used

Springin’ Sound StockのBGM・効果音

株式会社しくみデザイン

Used for selected background music and interface effects such as selection, confirmation, alerts, and result ranks.

Usage and terms
Edits / adjustments
Adjusted to the game's loudness target, with only runtime-used files included in the public build.
Version scope
Learn with Y-TEC kun ADV 0.1.46
Reviewed
Included items
  • bgm-future-1.mp3
  • se-alert.mp3〜se-select.mp3
  • se-rank-low.mp3〜se-rank-master.mp3
MusicCurrently used

魔王魂のBGM

森田交一 / 魔王魂

Used as stage music for scam prevention, AI, internet safety, and technical knowledge sections.

Usage and terms
Provider / source
魔王魂のBGM
Edits / adjustments
Adjusted to the game's loudness target and prepared for the public runtime.
Version scope
Learn with Y-TEC kun ADV 0.1.46
Reviewed
Included items
  • サイバー12
  • サイバー13
  • ヒーリング10
  • ヒーリング15
FontCurrently used

LINE Seed JP / Yu Gothic / Meiryo（Forge版のフォント指定）

LY Corporation / Windows付属フォントの各権利者

The Forge CSS specifies LINE Seed JP, Yu Gothic, Meiryo and the default sans-serif in that order. No font files are bundled, so the rendered typeface depends on fonts available on the device. The game does not serve or download LINE Seed JP.

Usage and terms
Edits / adjustments
The madoufmg.ttf remaining in the original WordPress source is excluded during Forge packaging, retaining CSS font references only. Font data is not modified or additionally redistributed.
Version scope
Learn with Y-TEC kun ADV 0.1.46 (Forge)
Reviewed
Included items
  • CSS font stack: LINE Seed JP → Yu Gothic → Meiryo → sans-serif
GamesCYBER FRONTIER: The Invisible FrontWith thanks for the music, sound effects, voice synthesis, ending theme, fonts, and tools supporting the game and its ending roll.
MusicCurrently used

魔王魂のBGM

森田交一 / 魔王魂

Used for title, battle, boss, epilogue, and true-ending background music.

Usage and terms
Provider / source
魔王魂のBGM
Edits / adjustments
Used as game-ready looped versions.
Version scope
CYBER FRONTIER 1.0.0
Reviewed
Included items
  • サイバー30 / 34 / 42 / 45
  • サイバー系ボス戦BGM
  • ピアノ18
Sound effectsCurrently used

効果音ラボの効果音

効果音ラボ

Used for card actions, attacks, defense, healing, results, and UI feedback.

Usage and terms
Edits / adjustments
Selected by in-game purpose, with only runtime-used files included in the public build.
Version scope
CYBER FRONTIER 1.0.0
Reviewed
Included items
  • se-attack.mp3
  • se-card-play.mp3
  • se-defense.mp3
  • se-heal.mp3
  • se-ui-click.mp3
  • ほかゲーム内SE
MusicGeneration support

エンディング曲「Cyber Frontier」

Treblo AI Music Generator

Used as the ending-roll theme. The lyrics were written by Y-TEC kun and Chappy (ChatGPT), and the composition was created using Treblo AI Music Generator. Some in-game credits and end-roll text still use the original legacy wording.

Usage and terms
Edits / adjustments
Format and level were adjusted for in-game playback.
Version scope
CYBER FRONTIER 1.0.0
Reviewed
Included items
  • endroll-cyber-frontier-treblo.ogg
FontCurrently used

Makinas 4 Square

もじワク研究 / Moji-Waku / HIROKI-CHAN

Used as the display font for cards, logs, buttons, and general UI.

Usage and terms
Provider / source
Makinas 4 Square
Edits / adjustments
The font data is unmodified and loaded as a web font.
Version scope
CYBER FRONTIER 1.0.0
Reviewed
Included items
  • Makinas-4-Square.otf
FontPreviously used

KINKAKUJI（金畫字／キンカクジ）

もじワク研究 / Moji-Waku / HIROKI-CHAN

Specified for large headings in the original edition, including the title, opening, and story, and listed in the ending-roll production credits. The current Forge game UI excludes this web font to avoid a browser decoding issue and uses Makinas 4 Square instead.

Usage and terms
Edits / adjustments
The original font data is unmodified. The current Forge edition does not bundle the KINKAKUJI web-font file.
Version scope
CYBER FRONTIER 1.0.0（原版・エンドロール制作クレジット / original edition and ending-roll production credits）
Reviewed
Creative serviceDesign / implementation support

Codex（こーでぃー）

OpenAI

Used to support scenario work, game design, programming, UI design, debugging, test play, and video composition. The corrected lyric credit for the ending theme is Y-TEC kun and Chappy (ChatGPT).

Usage and terms
Edits / adjustments
Y-TEC reviewed and selected proposals and generated content, editing them for the game.
Version scope
CYBER FRONTIER 1.0.0
Reviewed
Production toolDesign / implementation support

Playwright

Microsoft / Playwright contributors

Used to render HTML credit artwork for the ending roll and to verify the game in a browser.

Usage and terms
Provider / source
Playwright
Edits / adjustments
Used as a production and verification tool; Playwright and its browser binaries are not bundled with the public game.
Version scope
CYBER FRONTIER 1.0.0
Reviewed
Production toolDesign / implementation support

FFmpeg

FFmpeg developers

Used to compose the ending-roll visuals, subtitles, and music and encode the resulting WebM video.

Usage and terms
Provider / source
FFmpeg
Edits / adjustments
Used as a command-line production tool. FFmpeg binaries are not bundled with the public game.
Version scope
CYBER FRONTIER 1.0.0
Reviewed
StoriesDevelopment ComicCredits for the artwork, lettering, typography, and tools behind the everyday development comic.
ImageCreated by Y-TEC

Y-TEC Forgeキャラクターと4コマ原画

Y-TEC

Used as the textless panel artwork featuring Y-TEC kun, Chappy, and Cody.

Usage and terms
Edits / adjustments
The source art is cropped non-destructively, then Japanese and English lettering is composed separately.
Version scope
Development Comic episodes 001–004
Reviewed
Included items
  • public/story-assets/story-letterier-comic-panel.webp
FontCurrently used

Google Fonts掲載の日本語フォント

各フォントプロジェクト / Google Fonts

Used for dialogue, titles, effects, and in-panel UI lettering.

Usage and terms
Edits / adjustments
Font data is unmodified; size, color, and spacing are composed for each use.
Version scope
Development Comic episodes 001–004（確認済みの公開制作記録 / verified published production records）
Reviewed
Included items
  • Yusei Magic
  • RocknRoll One
  • Dela Gothic One
  • BIZ UDPGothic
Production toolDesign / implementation support

Pillow

Pillow contributors

Used for deterministic bilingual lettering, speech bubbles, and fixed four-panel composition.

Usage and terms
Provider / source
Pillow
Edits / adjustments
Pillow itself is unmodified and used from Y-TEC's composition scripts.
Version scope
Development Comic episode 001 onward
Reviewed
ReferenceReference

マンガパーツSTOCK

TopeconHeroes

Its categories, density, and use cases for focus rays, radial rays, motion lines, emotions, balloons, and backgrounds are used as quality references for the comic camera, background, and effects system. Any material imported into production is tracked per episode, and standalone redistribution is not allowed.

Usage and terms
Provider / source
マンガパーツSTOCK
Edits / adjustments
The current catalog and effect tokens organize use cases without bundling the source assets, using deterministic internal rendering for production. If source material is used, it is edited only as allowed by the official terms.
Version scope
Development Comic episodes 005 onward / camera-direction-system-v2
Reviewed
Included items
  • 集中線・放射線・移動線・感情・フキダシ・背景・おすすめの分類カタログ（原素材は非同梱）
AppsLetterierCredits for Letterier's runtime, fonts, AI-assisted stationery illustrations, and original Y-TEC visual identity.
Runtime libraryCurrently used

React / Tauri

Meta Open Source and Tauri Programme contributors

Used for the letter-editing UI and Windows desktop application runtime.

Usage and terms
Provider / source
React / Tauri
Edits / adjustments
The frameworks themselves are unmodified; Letterier implements its own editing, storage, and printing features on them.
Version scope
Letterier 2.0.1
Reviewed
FontCurrently used

Letterier bundled handwriting fonts

Google Fonts contributors and the respective type designers

Twenty recommended Japanese and Latin handwriting families (23 files) are bundled for letter text and interface typography.

Usage and terms
Edits / adjustments
Font files are unmodified; each OFL.txt and the acquisition manifest are bundled.
Version scope
Letterier 2.0.1
Reviewed
Included items
  • Klee One
  • Yomogi
  • Yuji Syuku
  • Yuji Mai
  • Yuji Boku
  • Zen Kurenaido
  • Yusei Magic
  • Mochiy Pop One
  • Hachi Maru Pop
  • Potta One
  • Caveat
  • Dancing Script
  • Patrick Hand
  • Kalam
  • Indie Flower
  • Shadows Into Light
  • Architects Daughter
  • Nothing You Could Do
  • Reenie Beanie
  • Kaushan Script
Detailed notice
Asset licence ledger
ImageGeneration support

Letterier stationery motif illustrations

Y-TEC with OpenAI image generation

Used to assist creation of transparent illustrations for twenty stationery templates and 160 additional decorations for design variants 2–5.

Usage and terms
Edits / adjustments
Y-TEC selected, cut out, placed, optimized, and reviewed every adopted illustration against the protected body area.
Version scope
Letterier 2.0.1（1.0.4の既存素材と追加図案 / existing 1.0.4 assets and additional designs）
Reviewed
Included items
  • public/template-motifs/*.png
  • public/template-art/*.png
Detailed notice
Asset licence ledger
ImageGeneration support

Letterier Forge showcase spring desk background

Y-TEC with OpenAI image generation

Used to assist creation of the cherry-blossom stationery-desk backdrop behind real Letterier app screenshots on the Forge Japanese and English showcase pages.

Usage and terms
Edits / adjustments
Y-TEC selected the background, composited real app screenshots and bilingual copy, avoided fabricated window decoration, and optimized the final hero images for the web.
Version scope
Letterier 1.0.4
Reviewed
Included items
  • src/assets/projects/letterier-showcase-spring-desk-background.png
  • src/assets/projects/letterier-showcase-ja.png
  • src/assets/projects/letterier-showcase-en.png
ImageCreated by Y-TEC

レタリエ制作裏話の実画面スクリーンショットと記事イラスト

Y-TEC

The bilingual production stories include real stationery, text-box, font and multi-page screenshots alongside creative-team illustrations.

Usage and terms
Edits / adjustments
The app screenshots were captured from Letterier 1.0.4 using synthetic text and images. Article illustrations are distinguished from app screenshots, cropped for the bilingual stories, and optimized for the web. No real letter or personal data was used.
Version scope
Letterier production story 2026-09-22
Reviewed
Included items
  • public/story-assets/story-letterier-team.webp
  • public/story-assets/story-letterier-team-en.webp
  • public/story-assets/story-letterier-article-discussion.webp
  • public/story-assets/story-letterier-letter-ja.png
  • public/story-assets/story-letterier-letter-en.png
  • public/story-assets/story-letterier-font-ja.png
  • public/story-assets/story-letterier-font-en.png
  • public/story-assets/story-letterier-pages-ja.png
  • public/story-assets/story-letterier-pages-en.png
IconCreated by Y-TEC

レタリエの名称・ロゴ・アプリアイコン

Y-TEC

Letterier's original name, logo, application icon, and binsen document icon.

Usage and terms
Edits / adjustments
Created by Y-TEC for Letterier and optimized for the interface, Windows, and file associations.
Version scope
Letterier 1.0.4
Reviewed
Runtime libraryCurrently used

PDF.js 6.3.289

Mozilla / PDF.js contributors

Used to read and rasterize pages from PDF-compatible AI files and PDFs. Its worker, character maps and conversion WASM are bundled locally.

Usage and terms
Provider / source
PDF.js 6.3.289
Edits / adjustments
Bundled resources are used without a CDN. Character maps and conversion WASM retain their own notices; the standard substitute fonts follow the separate terms below.
Version scope
Letterier 2.0.1
Reviewed
Included items
  • PDF.js worker
  • CMaps (BSD-3-Clause)
  • JBIG2 / OpenJPEG / QCMS WASM (individual BSD / MIT / Apache-2.0 notices)
FontCurrently used

Liberation Sans 2.1.5

Liberation Fonts contributors / Google / Red Hat

Used as a standard substitute font when PDF.js reads PDF-compatible artwork. It is separate from the twenty recommended handwriting families for letter text.

Usage and terms
Provider / source
Liberation Sans 2.1.5
Edits / adjustments
Four unmodified faces from the official 2.1.5 release are bundled locally with the OFL notice.
Version scope
Letterier 2.0.1
Reviewed
Included items
  • Liberation Sans Regular
  • Liberation Sans Bold
  • Liberation Sans Italic
  • Liberation Sans Bold Italic
FontCurrently used

Foxit PDF standard fonts

PDFium Authors（同梱フォント通知 / bundled font notice）

Used by PDF.js as standard substitutes for fixed-width, serif and symbol fonts while reading PDF-compatible artwork.

Usage and terms
Provider / source
Foxit PDF standard fonts
Edits / adjustments
Ten Type1 font files are bundled locally with the original notice.
Version scope
Letterier 2.0.1
Reviewed
Included items
  • Foxit Fixed (4 faces)
  • Foxit Serif (4 faces)
  • Foxit Symbol
  • Foxit Dingbats
Runtime libraryCurrently used

ag-psd / @xmldom/xmldom / fflate

Agamnentzar / Arjun Barrett / xmldom contributors

Used for PSD image loading, SVG XML parsing, and compression and decompression of document and artwork archives.

Usage and terms
Edits / adjustments
The libraries are unmodified and used for local processing. Copyright and MIT license texts are retained in the bundled notices.
Version scope
Letterier 2.0.1
Reviewed
Included items
  • ag-psd 31.0.2
  • @xmldom/xmldom 0.9.12
  • fflate 0.8.3
MusicCurrently used

Letterier 2.1.0 video background music

伊藤ケイスケ / OpenTracks

Background music / effects in the Letterier 2.1.0 introduction and guide. No standalone audio distribution; track sources are in the video descriptions.

Usage and terms
Edits / adjustments
Excerpting, volume adjustment, fades and synchronization. No author endorsement or affiliation is implied.
Version scope
Letterier 2.1.0 videos
Reviewed
Included items
  • 藍染 (22808)
  • SEN (18752)
  • 跳打 (14635)
  • bon dance (14320)
  • フラダン (14234)
  • 雪明り (14200)
  • 橙 (14372)
  • Seki（セキ） (14333)
Sound effectsCurrently used

Interface Sounds

Kenney

Background music / effects in the Letterier 2.1.0 introduction and guide. No standalone audio distribution; track sources are in the video descriptions.

Usage and terms
Provider / source
Interface Sounds
Terms
CC0 1.0
Edits / adjustments
Excerpting, volume adjustment, fades and synchronization. No author endorsement or affiliation is implied.
Version scope
Letterier 2.1.0 videos
Reviewed
Included items
  • click_003.ogg
  • confirmation_002.ogg
  • maximize_001.ogg
MoviesA Little Piece, to the MoonAn original MV about a little paper airplane carrying heartfelt feelings. Creative team, generative services, production tools and fonts.
VideoCreated by Y-TEC

Y-TEC 制作チーム / Creative team

Y-TEC

Concept, direction, story, lyrics, artwork and video roles are recorded in the project’s production credits.

Usage and terms
Edits / adjustments
Produced by Y-TEC. Generative services and production tools are recorded separately.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
MusicGeneration support

Treblo

Treblo

Used for composition, music generation and vocal generation. Generation, selection and music direction: Y-TEC kun.

Usage and terms
Provider / source
Treblo
Edits / adjustments
Y-TEC kun generated and edited the music and selected the material used in the work.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
ImageGeneration support

OpenAI image generation

OpenAI

Used to generate artwork. Art and character design: Y-TEC kun / Chappy. Illustration, animation and editing: Ten-chan.

Usage and terms
Provider / source
OpenAI image generation
Edits / adjustments
Generated images were selected as production material and composed and edited into the video.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
Production toolDesign / implementation support

Python

Python Software Foundation / contributors

Used for animation, video composition and editing.

Usage and terms
Provider / source
Python
Edits / adjustments
Used during production. The tool itself is not bundled with this introduction page.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
Production toolDesign / implementation support

NumPy

NumPy Developers

Numerical-processing library used for animation, composition and editing.

Usage and terms
Provider / source
NumPy
Edits / adjustments
Used during production. The tool itself is not bundled with this introduction page.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
Production toolDesign / implementation support

Pillow

Pillow contributors

Image-processing library used for animation, composition and editing.

Usage and terms
Provider / source
Pillow
Edits / adjustments
Used during production. The tool itself is not bundled with this introduction page.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
Production toolDesign / implementation support

OpenCV

OpenCV contributors

Image and video processing library used for animation, composition and editing.

Usage and terms
Provider / source
OpenCV
Edits / adjustments
Used during production. The tool itself is not bundled with this introduction page.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
Production toolDesign / implementation support

FFmpeg

FFmpeg developers

Used for video export and subtitle composition.

Usage and terms
Provider / source
FFmpeg
Edits / adjustments
Used during production. The tool itself is not bundled with this introduction page.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
FontCurrently used

Klee One SemiBold

Fontworks Inc. / The Klee Project Authors

Used for the title. Copyright 2020 The Klee Project Authors.

Usage and terms
Provider / source
Klee One SemiBold
Edits / adjustments
Used for lettering in the video. No font files are bundled with this introduction page.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
Included items
  • Klee One SemiBold
FontCurrently used

Zen Maru Gothic

Yoshimichi Ohira（大平善道） / The Zen Maru Gothic Project Authors

Medium for lyric subtitles; Regular for credits. Copyright 2021 The Zen Maru Gothic Project Authors.

Usage and terms
Provider / source
Zen Maru Gothic
Edits / adjustments
Used for lettering in the video. No font files are bundled with this introduction page.
Version scope
月へ、ひとひら / A Little Piece, to the Moon
Reviewed
Included items
  • Zen Maru Gothic Medium
  • Zen Maru Gothic Regular
AppsPersonal Data Breach DatabaseSearch, details, and analysis based on the nationwide ledger and reference materials.
Source codeCurrently used

個人情報漏洩事件データベース 全国版

Y-TEC（資料提供 / supplied materials）

Displays public fields projected from the supplied nationwide ledger, its incident report PDF, and reference image.

Usage and terms
Edits / adjustments
Validates the supplied 2026-11-08 daily r1 ledger and verification records, then projects public fields without internal contacts, research history, or pending candidates. Unconfirmed statuses are preserved. The supplied PDF and reference image are retained.
Version scope
Forge 2026-11-08
Reviewed
Included items
  • records.json
  • forge-2026-11-08.pdf
  • personal-data-risk-map.png
FontCurrently used

Leakage Report JP（Noto Sans CJK JP由来 / derived from Noto Sans CJK JP）

Adobe / Noto CJK contributors

Used for Japanese typesetting in the report PDF.

Usage and terms
Edits / adjustments
Subsets Noto Sans CJK JP 2.004, converts its outlines, and embeds the renamed Leakage Report JP in the regenerated PDF. No web font is added.
Version scope
Forge 2026-10-28
Reviewed
FontCurrently used

DejaVu Sans（提供PDFの埋込フォント / embedded in supplied PDF）

Bitstream / DejaVu fonts contributors

Used for symbols and related typesetting in the report PDF.

Usage and terms
Edits / adjustments
Embeds the existing DejaVu font in the report. The source font is unchanged and no web font is added.
Version scope
Forge 2026-10-28
Reviewed
GamesSTAR REBOUNDThanks for the music, effects, fonts, rendering technology and generation tools behind the three star seas.
Runtime libraryCurrently used

Phaser 3.90.0

Richard Davey / Phaser Studio

Used for rendering and game presentation.

Usage and terms
Provider / source
Phaser 3.90.0
Terms
MIT
Edits / adjustments
Included for its in-game use.
Version scope
STAR REBOUND v9 feedback30
Reviewed
FontCurrently used

Noto Sans JP

Noto Project

Japanese body and interface text.

Usage and terms
Provider / source
Noto Sans JP
Edits / adjustments
Included for its in-game use.
Version scope
STAR REBOUND v9 feedback30
Reviewed
FontCurrently used

Zen Kaku Gothic New

The Zen Kaku Gothic Project Authors

Japanese headings.

Usage and terms
Provider / source
Zen Kaku Gothic New
Edits / adjustments
Included for its in-game use.
Version scope
STAR REBOUND v9 feedback30
Reviewed
FontCurrently used

Orbitron

The Orbitron Project Authors

Latin display text, scores and chain counts.

Usage and terms
Provider / source
Orbitron
Edits / adjustments
Included for its in-game use.
Version scope
STAR REBOUND v9 feedback30
Reviewed
MusicCreated by Y-TEC

星流 / Star Current — 第1ステージ道中 / Stage 1

Y-TEC / AI-assisted production

An original composition made for STAR REBOUND, used as the Stage 1 field music.

Usage and terms
Terms
CC0 1.0
Edits / adjustments
Created without a supplied pre-existing melody or finished recording, using VSCO 2 CE piano, marimba, cello pizzicato and timpani samples. Existing CC0 terms apply to the extent rights may be granted; no exclusive rights are claimed in AI-assisted contributions.
Version scope
STAR REBOUND v9 feedback30
Reviewed
Included items
  • stage1-flow.ogg
  • stage1-flow.mp3
MusicCreated by Y-TEC

星流 / Star Current — 柔らかい笛のエンドロール版 / Flute credits arrangement

Y-TEC / AI-assisted production

A soft flute arrangement of the original Star Current theme, made for the end credits.

Usage and terms
Terms
CC0 1.0
Edits / adjustments
The lead is a synthesized breathy flute with slight modulation, layered with harp-like accompaniment, pads, bass and gentle bells. The full arrangement includes its closing decay. Answering bells use a VSCO 2 CE glockenspiel sample. Existing CC0 terms apply to the extent rights may be granted; no exclusive rights are claimed in AI-assisted contributions.
Version scope
STAR REBOUND v9 feedback30
Reviewed
Included items
  • credits-flute-v1.ogg
  • credits-flute-v1.mp3
MusicCurrently used

VSCO 2 Community Edition / Upright Piano

Versilian Studios and contributors / Simon Dalzell / Ivy Audio

Samples for original music and effects, including the answering bell in the credits arrangement.

Usage and terms
Terms
CC0 1.0
Edits / adjustments
Pitch, filter, envelope and room processing; the flute lead is synthesized.
Version scope
STAR REBOUND v9 feedback30
Reviewed
MusicCurrently used

Heavy Battle 2 / Hard Boss Battle 1 / Space Battle / Space Boss Battle

MintoDog

Music for the Stage 1 and 2 bosses and the Stage 3 field and boss.

Usage and terms
Terms
CC0 1.0
Edits / adjustments
Original recordings retained; playback level and looping are managed in game.
Version scope
STAR REBOUND v9 feedback30
Reviewed
Included items
  • Heavy Battle 2
  • Hard Boss Battle 1
  • Space Battle
  • Space Boss Battle
MusicCurrently used

Frenzied Swimming

Some Weirdo

Stage 2 field music.

Usage and terms
Provider / source
Frenzied Swimming
Terms
CC0 1.0
Edits / adjustments
An MP3 fallback was encoded.
Version scope
STAR REBOUND v9 feedback30
Reviewed
MusicCurrently used

Doodle menu like song

StumpyStrust

Opening music.

Usage and terms
Provider / source
Doodle menu like song
Terms
CC0 1.0
Edits / adjustments
A 12-second excerpt with level adjustment.
Version scope
STAR REBOUND v9 feedback30
Reviewed
Sound effectsCurrently used

Interface / Impact / Sci-Fi Sounds

Kenney

Pickup, button and boss-defeat cues; notices for earlier chain cues are retained.

Usage and terms
Terms
CC0 1.0
Edits / adjustments
Pitch, layering, gain and fades depend on the cue. Current five-chain bells are original synthesis.
Version scope
STAR REBOUND v9 feedback30
Reviewed
Sound effectsCurrently used

Theremin Laser SFX

Zane Little

Player shot cue.

Usage and terms
Provider / source
Theremin Laser SFX
Terms
CC0 1.0
Edits / adjustments
Gain and edge fades adjusted.
Version scope
STAR REBOUND v9 feedback30
Reviewed
Sound effectsCurrently used

Dull explosion

qubodup

Regular enemy defeat cue.

Usage and terms
Provider / source
Dull explosion
Terms
CC0 1.0
Edits / adjustments
Gain and edge fades adjusted.
Version scope
STAR REBOUND v9 feedback30
Reviewed
Sound effectsCurrently used

キラキラ08-1 / Onoma-Sparkle08-1 (Short)

OtoLogic

Stage passage cue. Sound by OtoLogic.

Usage and terms
Edits / adjustments
First 3 seconds, gain adjustment, a 280 ms ending fade, 1 ms edge fades and OGG/MP3 encoding. Pitch and speed retained.
Version scope
STAR REBOUND v9 feedback30
Reviewed
ImageGeneration support

作品用の生成ラスタ画像 / Generated game artwork

OpenAI image generation / Y-TEC

Generated backgrounds, characters, items and projectiles. The introduction-page hero is a collage made from three actual gameplay captures.

Usage and terms
Edits / adjustments
Resizing, alpha processing and WebP conversion. Individual asset notices and the limits of rights the provider can grant remain in effect; no exclusive rights are claimed. OpenAI image generation was also used to compose the introduction collage.
Version scope
STAR REBOUND v9 feedback30
Reviewed