Company profile
About Aperone
Products that solve.
Aperone is a product studio focused on Castify, AI Coding Academy, Web Launch, and custom development. We build small, ship fast, and improve based on real use.
Rather than building one large platform, we ship focused tools fast and let the market decide which ones scale. Small by design. Iterative by intent.
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Founder
Yu Otsuka
Founder & CEO, Aperone · Keio University, Faculty of Economics / AI × Product Development
Began building software independently during his first year at Keio University. Before founding Aperone, he designed and delivered custom productivity tools for multiple organizations — including a Slack-integrated attendance system, a GPT-powered FAQ assistant, and a Google Workspace expense management tool.
Founded Aperone in 2023 to scale beyond bespoke engagements. Specializes in LLM-powered SaaS products (Claude, GPT-4o), handling product design, engineering, and growth end-to-end.
Build in Public
Product roadmaps, revenue figures, and the problems we face — all published openly. Transparency is not just a value we hold. It is a deliberate distribution strategy that compounds the credibility of everything we build.