九く寸すん五ご分ぶ

noun

short dagger; nine-sun-five-bu dagger

Archaic term for a dagger with a blade length of about 9 sun 5 bu (roughly 28.8 cm). Used in historical or literary contexts.

• 時じ代だい劇げきで、侍さむらいが九く寸すん五ご分ぶを懐ふところに忍しのばせている場ば面めんがある。

  In period dramas, there are scenes where a samurai conceals a nine-sun-five-bu dagger in his breast fold.