一ひと粒つぶ種だね

noun

only child; precious only child

Idiomatic expression for a family's sole child, often with a nuance of being cherished or precious. Literally 'one-grain seed'.

• 彼かの女じょは一ひと粒つぶ種だねだから、両りょう親しんに大だい事じに育そだてられた。

  She is an only child, so she was raised with great care by her parents.

• 一ひと粒つぶ種だねの息子むすこが留りゅう学がくして、家いえの中なかが静しずかになった。

  Their precious only son went to study abroad, and the house became quiet.