Onpyx — Tokyo

Build, then
set loose.

つくって、世に放つ。

Onpyx is an independent lab that builds web services wherever curiosity points, then sets them loose on the world. Manga, stocks, games — no genre is off limits. If we find ourselves wishing something existed, we build it and ship it.

Projects作っているもの

4 projects · 1 live

Project 01 Live

Trader's Gambit

AI stock screening for Japanese equities

An AI screening platform for traders of Japanese stocks. Every morning it analyzes every name on the Tokyo Stock Exchange, cross-checks multiple methods, and delivers a refined shortlist from both day-trade and swing perspectives — always transparent about why each stock made the cut. Currently running as a free public beta.

WebJapanese equitiesPublic beta

Visit service →

Project 02 Coming soon

TASTEOME

A 3D map of pop-culture taste

A map of taste covering more than 1,800 works of manga, anime, film, games and TV, profiled along 7 axes into 16 types. Not a ranking of good and bad — a 3D map for seeing where each work sits, and where your own taste lives. Launching soon.

WebConsumerLaunching soon

Coming soon →

Project 03 In development

Logic Arena

Beat AI by logic

A mobile app that pairs debate battles against AI opponents with five-minute daily thinking drills. Out-argue AI characters with very different temperaments, and watch your reasoning sharpen through daily practice and a belt-rank system.

MobileJapanese / EnglishIn development

In development →

Project 04 In development

triffchat

A messenger you play with (working title)

A messenger for playing with friends, with AI joining the conversation as prompt-setter, instigator and judge. The AI keeps the game moving, so play starts without the awkwardness. Answer a prompt, laugh at the AI's verdict, share the best moments — a new kind of conversation.

MobileGen ZIn development

In development →

About Onpyx

A lab that builds things,
then sets them loose.

Onpyx is an independent lab based in Tokyo. No outside funding — one person builds and runs web services in whatever fields curiosity leads to, and takes full responsibility for them.

Trade name Onpyxオンピクス

Founded 2026

Representative Tanaka Shotaタナカショウタ — Founder

Location Tokyo, Japan東京都

Business Planning, building and running consumer web services and mobile apps個人向けWebサービス、モバイルアプリの企画・開発・運営

Contact [email protected]

Build, thenset loose.