YABAI
Real Japanese slang, one giant word at a time
Textbooks teach Japanese that stops at the classroom door. YABAI is the other half: 308 real slang, internet and fandom words, each on a card built around giant Japanese typography. Every word has a meaning, a real example, a vibe check (safe to use? friends only? careful?) and a story — and when the origin is uncertain, it says so instead of inventing one. Built end to end with AI agents in Claude Code. 13 languages, works offline. No streaks, no tests, no XP.
YABAI is a Android company. It launched on Product Hunt on Sep 20, 2026, with 92 upvotes. Adamlead has 1 person on file at YABAI.
YABAI timeline
- Real Japanese slang, one giant word at a time
People at YABAI
Emails are shown masked, with whether each one has been verified. They're unlocked in the app with Lifetime access.
| Name | Title | |
|---|---|---|
| Maker | – |
Frequently asked questions
Who works at YABAI?
Adamlead has 1 person on file at YABAI, including Yuichi Sato (Maker). Each email shows whether it has been verified.