二十歳はたとせはたとせFreq.FrequencyTop 50,000Meanings1nountwenty yearsarchaicArchaic term for a period of twenty years. In modern Japanese, 二十年 (にじゅうねん) is the standard expression.古ふるい和わ歌かに「はたとせ」という表ひょう現げんが使つかわれている。The expression 'hatatose' is used in old waka poetry.