Tsugaru Nobuyuki (津軽 信順, April 18, 1800 – December 5, 1862) was the 10th daimyō of Hirosaki Domain in northern Mutsu Province, Honshū, Japan (modern-day Aomori Prefecture).

Yasuchika was originally a hatamoto ruling a 4000 koku fief at Kuroishi before he was adopted into the main Tsugaru clan line to become daimyō of Hirosaki.

Yasuchika enjoyed good relations with the Tokugawa shogunate and in 1811 was successful in arranging an extremely favorable marriage for Nobuyuki to the daughter of Konoe Motosaki, of the Kyoto court nobility.

Yasuchika continued to rule behind the scenes from the clan's Edo residence, and lacking a personal power base or the respect of his senior retainers, Nobuyuki was reduced to an ineffectual figurehead, and was derided as the "Idiot Lord" (馬鹿殿様, Baka-tonosama) of Tsugaru.

The shogunate was also outraged by reports that, despite the domain's desperate financial situation, Nobuyuki was spending profligately on entertainments such as parades, firework displays, festivals and moon-viewing parties, and that he had taken a commoner (the daughter of an Edo oil merchant) as his concubine.