第だい四よん種しゅ郵ゆう便びん物ぶつ

noun

fourth-class mail

A category of domestic mail in Japan for certain printed materials, educational materials, and other specified items, offering lower postage rates.

• 第だい四よん種しゅ郵ゆう便びん物ぶつは、通つう信しん教きょう育いくの教きょう材ざいなどに利