After that, Junkei helped Mitsuhide AKECHI as Yoriki Daimyo (territorial lord who supports other lords) to make military achievements including the expedition of Hisahide (the Battle of Shigisan-jo Castle) and the expedition of Ikko sect's revolts.
その後は明智光秀の与力大名として久秀討伐（信貴山城の戦い）、一向一揆討伐などで活躍した。