Hirosaki Domain
In 1756 CE, Mitsugu Nyui was a "kanjō-bugyō" (a high-ranking Edo period official responsible for finance) of the Hirosaki Domain in the Tsugaru Peninsula. He implemented an assimilation policy for Ainu who were engaged in fishing in the Tsugaru Peninsula. Since then, Ainu culture was rapidly lost from Honshu.