ウエストポーチ

noun

waist bag; belt bag; fanny pack; bum bag

A small bag worn around the waist, often with a belt or strap. In Japanese, this loanword is the standard term for what is called a fanny pack (US) or bum bag (UK).

from English waist pouch

• 旅りょ行こうのときはウエストポーチが便べん利りだ。

  A waist bag is handy when traveling.

• 彼かれはいつもウエストポーチに財さい布ふとスマホを入いれている。

  He always keeps his wallet and smartphone in his fanny pack.