鯉こい口ぐち

noun

scabbard mouth; sword sheath opening

Refers to the opening of a Japanese sword scabbard where the blade is inserted. A specialized term used in the context of swords and martial arts.

• 刀かたなを鯉こい口ぐちに差さし込こむ。

  Insert the sword into the scabbard mouth.

noun

carp-mouth sleeve shirt

A style of shirt with wide, carp-mouth shaped sleeves, often associated with traditional Japanese clothing or workwear. The term is derived from the resemblance to a carp's mouth.

• 職しょく人にんが鯉こい口ぐちシャツを着きて作さ業ぎょうしている。

  The craftsman is working wearing a carp-mouth sleeve shirt.