In the Otate War, which took place after the death of Kenshin UESUGI, he was first dispatched to the border of the Shinetsu region for the purpose of supporting Kagetora UESUGI; later, he worked as a liaison for the Koetsu Alliance with Kagekatsu UESUGI, who won the war.
上杉謙信の死後に起きた御館の乱では、はじめ上杉景虎支援を目的に信越国境へ派遣されたものの、のちに乱を制した上杉景勝との甲越同盟では取次役を務めている。