After restoring the Koso Alliance, Ujimasa resumed a fight against Kenshin, and in 1574, when Kenshin moved his forces to Kozuke Province, Ujimasa also headed to the Province, and the two armies confronted at Tone-gawa River.
甲相同盟復活後、氏政と謙信の戦いが再び始まり、天正2年（1574年）に謙信が上野に進出すると、氏政も上野に出陣し、利根川で対陣した。