Nihontu

The Nihontu is a fearsome vessel equipped with banks of lance turrets and heavy armour, and is the pride of the Ma'Kao dynasty of Rogue Traders. Lady Sun Lee's paranoia over losing the ship in combat, however, prompts her to never leave port without an escort of three raiders. The Nihontu itself is a Dauntless class light cruiser with a crew of approximately 65,000, featuring a Prow Dragon's Breath Lance weapon as well as various Ryza-pattern plasma batteries.

Source
Rogue Trader: Lure of the Expanse

pg. 137