レターパック

noun

Letter Pack (Japan Post mail service)

A Japan Post prepaid envelope service for sending A4-sized documents and small goods up to 4 kg. Often used for important documents, online sales shipments, and applications.

• 履り歴れき書しょはレターパックで送おくりました。

  I sent my resume by Letter Pack.

• レターパックなら追つい跡せきもできるので安あん心しんです。

  With Letter Pack you can track it, so it's reassuring.