せんせんだい 先々代 LinksSentence search for 先々代Sentence search for せんせんだいSentence search for 先先代Kanji details for 先 and 代Edit in JMdict Noun, Noun which may take the genitive case particle 'no'1. the one before last; two generations, etc. previousOther forms先先代 【せんせんだい】 Discussions Log in to talk about this word.