Dictionary/一男いちなんIchinan一男 (Ichinan) is a Japanese noun meaning “boy, eldest son”.Meaningsnounboy; eldest sonKanji in 一男一one男maleRelated words一寸a little貴方you男man一緒にtogether (with)一one一つone一one一同all present一番number one一人one person男性man第一first