二十世紀 にじっせいき Also written にじゅっせいき, 20世紀 Meanings Noun twentieth century Nijisseiki pear (variety of nashi); Nijusseiki pear See also: 梨 (なし). Kanji 二 two. Read as ニ. 十 ten. Read as ジッ. 世 generation. Read as セイ. 紀 epoch. Read as キ. Jinuma: Japanese Dictionary · Word lists