It is a kanji puzzle that completes a two-character idiom.
The answer can be answered from eight choices.

The level of difficulty is divided from beginner to advanced, so you can challenge at a level that suits you.
There are also "Today's Issues" and special issues that are in line with the theme. (Theme: names of places and people etc.)

Furthermore, the number of problems is over 300 questions! !

We apologize for the inconvenience, if you have any problems or requests, but it would be very nice if you could let us know in a review or email.

Icon design: ryo
UI design: for
Music material: the devil's soul
Production software: Unity