How Asoi Works

1. Connect Your Vocabulary

Your journey begins by connecting your known vocabulary. We offer two ways to do this:

Connect your WaniKani account to use vocabulary you've already learned.

Your API key is stored securely in your browser and never sent to our servers.

Upload your vocabulary with word, reading, and meaning in 3 columns.

犬,いぬ,dog
本,ほん,book
学生,がくせい,student
水,みず,water
日本,にほん,Japan
大きい,おおきい,big
小さい,ちいさい,small

Supports .csv, .txt, or .xlsx files. You can also download pre-made JLPT decks from the Downloads page.

Once your vocabulary is connected, you can choose from our collection of games designed to reinforce your Japanese knowledge:

Can you recall the reading for words from their English meanings?

Can you split them right? Separate words joined together!

Spot the difference! Match kanji that look alike but aren’t the same.

Test your memory! Pair kanji with their meanings before time runs out.

Type readings before time runs out! Game speeds up as you build streaks.

Master verbs by conjugating them into different forms!

All games use only your vocabulary. This ensures you're practicing words you already know, making the experience more effective.

Each game offers customization options to match your learning style:

Adjust difficulty levels, input methods, and game length to fit your needs. Use helpful hints when you need assistance.

WaniKani users can filter by SRS stage to focus on specific sets of vocabulary at different learning stages.

Each game provides immediate feedback on your performance: