Take a common sense quiz with about 10 questions a day.
With 10 questions, you can acquire knowledge you did not know.
* You can solve the problem according to your current level by step by step of the category.
Day by day, my Japanese skills improve!
* Check out the issues I didn't know with bookmarks!
If you get a problem you don't know while solving the problem, check it and go to the bookmark page later.
You can check the problem.
* Solve only bookmarked problems!
By solving the problem you checked with bookmarks, you can upgrade my knowledge.
can.
Try simple quiz solving anywhere without complicated login.