This timeline is based on project pages and version histories previously published on another website, together with current development records. We will keep it updated so each project’s growth remains visible even when its publishing home changes.
How the work has changed
First, make it work
It began with the joy of turning an idea into something people could actually play or use.
Then, make it safe
The work expanded to storage, encryption, compatibility, and safe ways to stop when something goes wrong.
Release is part of the craft
Guides, verified scope, hashes, and licenses became part of what we deliver, together with source code for projects released as open source.
Development and release timeline
- GAME / FIRST STEP
Turn learning into something playable
- Learn with Y-TEC kun ADV
We published a PC-98-inspired browser ADV on another website, turning lessons about scams, the internet, and AI into a friendly experience that teaches without blaming the player.
What changed in this phaseRather than listing correct answers, we began combining characters, choices, sound, and feedback to help people stay engaged through the whole experience.
- GAME / EXPRESSION
Expand expression through story, cards, and sound
- CYBER FRONTIER: The Invisible Front
We published a solo game on another website that turns cyber threats into characters and combines story, card battles, video, music, saving, and restoration.
What changed in this phaseThe scope grew from a single-screen activity to a long-form work with many assets. Presentation, save compatibility, and asset rights became part of game development.
- APP / DAILY TOOLS
Make everyday notes and plans portable
- Keisai
- Koyomado
Keisai 1.5.0 first appeared on July 21 and Koyomado 0.1.5 on July 22, both on another website. Within days, we improved window restoration, multi-monitor behavior, and user guidance.
What changed in this phaseWe started thinking beyond working features: comfortable daily use, portability, restoring saved state, and instructions that remain clear after updates.
- APP / SAFE MIGRATION
Explain safety boundaries, not only convenience
- Y-TEC Browser Capsule
- Y-TEC Data Capsule
- Y-TEC Wi-Fi Capsule
We released three focused apps for moving browser data, PC data, and Wi-Fi settings between computers, using encryption, tamper detection, recovery keys, and selective backup where appropriate.
What changed in this phaseWhat an app cannot protect became as important as what it can do. Hashes, manuals, format compatibility, verified environments, and regression testing across VMs became part of release quality.
- APP / OPEN DEVELOPMENT
Design release quality from the beginning
- Y-TEC Tsumugi Drive
- Keisai goes open source
- Koyomado RC
Tsumugi Drive development emphasizes disk-operation safety, recovery after failure, and consistency between Windows and WinPE. Keisai and Koyomado also moved forward with source releases and RC updates.
What changed in this phaseA successful build is no longer enough. Data-format migration, rollback, unsigned-build disclosure, licensing, and the real distributed artifact all became explicit quality gates.
- SITE / NEXT CHAPTER
A new creative home called Y-TEC Forge
- Y-TEC Forge
We began building a clearer home for apps, games, and open source, with Japanese and English pages, responsive design, contact, and privacy built into the experience.
What changed in this phaseThe story now includes more than finished downloads: why we create, how the work is built, what we learned, and how each project evolved. As Y-TEC expanded the places where it creates and shares work, it put longstanding values into words again and gave Y its two meanings: “Your” and “Why?”.