Learn Japanese,
16 words a day
Vocabulary for the JLPT and real life — audio on every word, kana-flexible answers, spaced repetition, and a Tetris break that makes it stick.
Free to start — no credit card · your progress is saved to your account
Pick a language pair, type the answer, take a Tetris break — in 10 seconds.
Why Japanese rewards the daily habit
A language of thousands of small wins — perfect for 16 at a time.
The JLPT is vocabulary-first
From N5 to N1, the JLPT leans on word knowledge — 文字・語彙 is its own section. Sixteen retained words a day is the compounding that ladder rewards.
Games, anime, culture
The media you already enjoy becomes listening practice the moment the words are yours. Vocabulary is the subtitle-to-no-subtitle bridge.
Work & travel
Japan runs on politeness formulas and set phrases — but underneath them, vocabulary by topic: office, restaurant, transport, emergencies. All of them are topics here.
Finish with proof, not a feeling
Every CEFR tier you reach earns a verifiable certificate with a public serial — retention checked at 7, 30 and 90 days.
Specimen. Real certificates carry a unique serial and a public verification link; the Sealed mark means recall was re-verified 90+ days after learning.
What makes 16Word different
Built for kana, kanji, and memory that lasts.
Kana-flexible answers
Type ひらがな or カタカナ — the checker folds them to the same reading, so either spelling of the same word is right. Kanji answers still ask for the kanji.
Hear every word
Audio on all 6,300+ words — pitch and rhythm come from hearing, not from romaji.
The Tetris loop
Every clean answer banks Tetris pieces; every miss costs a garbage line. The break between words is what moves them into long-term memory.
Offline packs
Download your topics and keep practising on the Yamanote line, the plane, or anywhere offline.
Your first 16 words of Japanese are waiting
Five minutes today. A year of days like it reads menus, signs and subtitles — checked, spaced and sealed.