He all but subjugated Shinano Province while simultaneously carrying out the Battle of Kawanakajima against Kenshin UESUGI of Echigo Province, whom he fought in the process of invading Shinano Province, which was said to have occurred five times.
その過程で対立した越後国の上杉謙信と5次にわたると言われる川中島の戦いを行いつつ信濃をほぼ平定する。