After Ieyasu's move into the Kantō region, Nobuyoshi was granted a 30,000 koku fief centered on Kogane Castle in Shimōsa Province. From Kogane he was moved to Sakura Castle, and a fief of 100,000 koku.
In 1600, for his service as rusui-yaku for the western enceinte of Edo Castle, Ieyasu (victorious in the wake of the Sekigahara Campaign) gave his son the 250,000 koku Mito fief. However, as Nobuyoshi had been sickly from birth, he soon died at the age of 19. With Nobuyoshi's death, the Takeda of Kai came to a second end.