郵ゆう便びん貯ちょ金きん

noun

postal savings; postal deposit

Refers to the savings system operated by the post office, historically a major savings vehicle in Japan.

• 祖そ母ぼは郵ゆう便びん貯ちょ金きんに毎まい月つき少すこしずつお金かねを預あずけている。

  My grandmother deposits a little money into her postal savings account every month.