Added by The doctor

In the mirror universe, the ISS Nobunaga was a Constitution-class starship modeled after the USS Defiant. Its construction was ordered by Empress Hoshi Sato I due to renewed rebellion activity. The vessel was equipped by Commander Charles Tucker III with a prefix code that would allow the Empress to take control of the ship through subspace. However, while the Nobunaga was stationed at Beta Nairobi, Tucker gave the code to a clone of Jonathan Archer, who had joined the rebellion against the Empress. Archer then used the Nobunaga in strikes against the Empire. (ENT short story: "Nobunaga")

The ship may have been named for the mirror counterpart of Oda Nobunaga, who began the unification of Japan in the late 16th Century.

Early series of Constitution-class class I/class XI heavy cruiser starships
Federation Starfleet (primary universe)	Built to mk I specifications	Constellation • Constitution • Defiant • Endeavor • Enterprise • Excalibur • Exeter • Farragut • Hood • Intrepid • Kongo • Lexington • Potemkin • Republic • Valiant (I) • Yorktown
	Various specifications	Alexander • Asimov • Brahe • Confederate • Enterprise (Vardaine copy) • Glory • Indomitable • Isshasshte • Jefferson • John F. Kennedy • Nautilus • Olympus Mons • Ortisei • Pathfinder • Surak • Tao Feng • Trojan • Venture • Zimbabwe • unnamed Constitution-class starships
Terran Empire Starfleet (mirror universe)		Carnage • Banshee • Defiant • Enterprise • Excalibur • Hood • Kodos • Lexington • Nobunaga • Potemkin
See also the later subclasses: Bonhomme Richard-subclass (mk II) • Achernar-subclass (mk III) • Tikopai-subclass (mk IV) • Enterprise-subclasses (mk I-III refits) • other Constitution variants