生せい没ぼつ年ねん不ふ詳しょうMeaningsExpression1. dates of birth and death unknownKanji used生life没go under年year不negative詳detailedComposed of生せいlife; living; I; me; myself; studentNoun没ぼつ年ねんyear of a person's death; one's age at deathNoun不ふ詳しょうunknown; unidentified; unspecifiedNa-adjective