Kantō region
Uesugi Tomosada of the Ogigayatsu branch of the Uesugi clan attacking Kawagoe castle, he was joined by his more powerful relative Uesugi Norimasa from Yamanouchi branch Uesugi clan, who held the post of Kantō Kanrei, the shōgun's deputy in the Kantō region by Ashikaga Haruuji, the Kantō kubō in Koga, and by a host of anti-Hōjō daimyō from the Kantō region.