Katana

A katana was a traditional Japanese sword.

In 2258 of an alternate reality, Hikaru Sulu's used a retractable sword resembling a katana to fight off the Romulans.

A samurai wielding a katana appeared to the crew of the USS Enterprise (NCC-1701) during a visit to the Shore Leave Planet in 2267. 

In 2268, after the Beta XII-A entity altered the matter on the USS Enterprise to create primitive weapons, Lieutenant Hikaru Sulu was given a katana.