郵ゆう便びん箱ばこ

noun

mailbox (for receiving mail); letter box

Refers to a private mailbox where delivered mail is received, such as at a home or office.

• 郵ゆう便びん箱ばこをのぞいたら、手て紙がみが届とどいていた。

  When I checked the mailbox, a letter had arrived.

noun

mailbox (for sending mail); postbox

Refers to a public collection box where outgoing mail is deposited, often red in Japan.

• 角かどの郵ゆう便びん箱ばこに手て紙がみを出だしに行いく。

  I'm going to drop this letter in the mailbox on the corner.