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4369 proverbs and historical idioms (meanings), 3072 four-letter idioms (meanings/synonyms), 640 three-letter idioms (meanings), 2040 obfuscated kanji (readings), and an overwhelming volume of content. A simple learning dictionary. When you come across an unfamiliar proverb or four-character idiom in your daily life, you can immediately look up the meaning. In addition, "Four-letter idioms" covers idioms corresponding to the 2nd grade, pre-1st grade, and 1st grade of the Kanken.
Each has a "dictionary mode" and a "quiz mode". In the quiz mode, you can use it like a "reverse lookup dictionary" or "write practice" to learn the meaning of an idiom, and you can also enjoy showing off trivia knowledge when everyone gathers.
It also has a bookmark registration function that is convenient for learning.
Hyakunin Isshu, lunar calendar conversion, English proverbs, twenty-four seasonal seasons, seventy-two seasons, comparison table of old country names and prefectures, ABC abbreviations, etc. are included as appendices.