This page provides a concise reference to the author and the intent of this journal. It exists so readers can understand who is writing these design notes and why the archive is maintained.
Y. Arakawa
- Programmer, born February 1979
- Around 25 years in system development, not full-time coding: I also
handle sales and quality control for other products
Working Context
I lead the internal business systems at a non-IT company. The work is not about building flashy interfaces. It is about keeping core operations reliable under constant change.
- Full-stack responsibility across multiple systems
- Business-first constraints and long-term maintenance
- Architecture decisions driven by real operations
Background
My career started in a contract engineering services environment in Japan and later in an IT-subsidiary focused on internal systems. That path keeps me close to the actual constraints of business software: legacy data, complex approvals, and teams that need stable tools, not experiments.
Development Style
Most of Cotomy is built solo. AI has improved implementation speed, but it also made one thing more obvious: weak design collapses faster under automated delivery. The focus here is the balance between speed and architectural integrity.
- Small-team development, single-owner decisions
- AI-assisted implementation
- Design first, code second
About Cotomy
Cotomy is a DOM-first UI runtime for long-lived business applications.
Official site: https://cotomy.net
On AI
AI can accelerate the act of writing code. It cannot fix a flawed model. I use it as a multiplier for execution, while treating design clarity as the non-negotiable baseline.
A Note on English
English is not my strongest language. Recent tools make it possible to share ideas globally anyway. If this writing helps someone build better systems, the language gap is worth crossing.
Outside Work
I enjoy walking through city bars and talking with people. Wine, sake, and Scotch are my usual choices. It keeps me grounded and helps me reset.
The perspective presented here is not theoretical. It is shaped by the need to keep real systems stable over time, which is the foundation of Cotomy’s design philosophy.
