Two-kanji idioms, Niji-jyukugo, will increase your Japanese vocabulary to remember its synonyms and antonym.
When you write a sentence in Japanese, a lot of synonyms (words represent the same meaning) are very useful for you.

Antonyms, the power to explain things from the opposite side, will be a shortcut to successfully express what you want to say.

This app has a lot of synonyms and antonyms of two-kanji idioms for Japanese beginner.
Enjoy!

# Japanese only