How Asoi Works

Three simple steps to personalized Japanese games

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 a list of Japanese words you already know.

犬 
本 
学生 
水 
日本 
大きい 
小さい

Save as .txt or .csv file. A sample file is available on the home page.

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

Guess the reading of Japanese words in this Wordle-inspired challenge.

Identify where words begin and end in continuous Japanese text.

Match pairs of words and meanings in this memory challenge.

Find Japanese words hidden in a grid of characters.

Given English definitions, recall the Japanese words.

Fill in a crossword puzzle with Japanese words.

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: