The USS Yamaguchi (NCC-26510) was a Federation Ambassador-class heavy cruiser that was in service with Starfleet in the mid-24th century.
In 2367, the Yamaguchi participated in the battle against the Borg at Wolf 359 in the fleet of forty Federation starships. It engaged the attacking Borg cube, alongside the USS Bellerophon, at the time the cube had tractored the USS Saratoga. (DS9: "Emissary")
The name Yamaguchi literally means "mountain mouth" in Japanese. The name was also a prefecture in Japan, as well as a common Japanese surname.
The Yamaguchi was the final appearance of the Ambassador-class studio model. Two of the ship's decals remained on the starship to this day.
You can download this star trek paper craft from here: Star Trek: Ambassador Class Starship - USS Yamaguchi NCC-26510 Papercraft [Instruction]