一人息子(ひとりむすこ) ひとりむすこ noun only son family 1. only son A family's sole male child. Implies no other male siblings — there may still be daughters. 彼(かれ)は一人息子(ひとりむすこ)だ。🔊 He is an only son. 一人息子(ひとりむすこ)を溺愛(できあい)する母親(ははおや)。🔊 A mother who dotes on her only son. 両親(りょうしん)は一人息子(ひとりむすこ)が遠(とお)くに就職(しゅうしょく)したのを寂(さび)しがっている。🔊 His parents are sad that their only son got a job far away. Compound of 一人(ひとり) (one person) + 息子(むすこ) (son). The reading ひとり is irregular for 一人 in this compound.Common collocations一人息子(ひとりむすこ)を持(も)つ: to have an only son一人息子(ひとりむすこ)を溺愛(できあい)する: to dote on one's only son大切(たいせつ)な一人息子(ひとりむすこ): precious only sonSimilar words一人娘(ひとりむすめ): only daughter一人(ひとり)っ子(こ): only child (regardless of sex)長男(ちょうなん): eldest son — may have younger siblings Related Words Compare: 一人娘(ひとりむすめ) (only daughter) Compare: 一人(ひとり)っ子(こ) (only child) Compare: 長男(ちょうなん) (eldest son) general Added 2026.6.7 12:04 · Revised 2026.9.2 13:02 28500/28913_hitorimusuko