How to say "mailbox" in Japanese

• ポストJLPT N5approx.Common
  nounThe ordinary everyday word for a postbox — the public box, often red in Japan, where you drop letters to be mailed. Use this for the street-side box, not the one at your door.
  いったんポストに入いれたものは、郵便局ゆうびんきょくの所轄しょかつになる。↗

  Once a thing is posted, it is in the care of the Post Office.
• 郵便受けゆうびんうけCommon
  nounThe mailbox or mail slot at a house or apartment building where delivered mail arrives. It names the receiving spot at a residence, in contrast to the public box used for sending letters.
  彼女かのじょからの手紙てがみが郵便受ゆうびんうけにはいっていた。↗

  I found her letter in the mailbox.

Use 「ポスト」 for a physical postbox for outgoing letters, and 「郵便受け」 for the box or slot at a home that receives mail; the choice mainly depends on whether mail is sent or delivered.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• ポストpostbox
• 郵便受けゆうびんうけmailbox
• 郵便箱ゆうびんばこmailbox (for delivered mail)
• メールボックスmailbox
• 郵便ポストゆうびんポストpostbox
• 郵便差出箱ゆうびんさしだしばこpostbox