hicross.jp/zh-hans/vocabulary/theme/yojijukugo
A vocabulary study tool presenting 38 four-character idioms (yojijukugo) organized by theme, with JLPT level classifications from N1 to N4, meanings in Simplified Chinese, example sentences, and multiple-choice practice.
VocabularyJLPT and other testsIn JapaneseIdioms and proverbsJLPT N1JLPT N2JLPTJLPT N5JLPT N4