On August 4, the detached 2nd brigade detoured to the vicinity of Tsuboya along the main road of Kijino, advanced through a by-pass and attacked the rear of the Miyazaki-Shinbo-tai troop (the troop of the soldiers recruited newly in Miyazaki) that had guarded the Watari-gawa River.
別働第二旅団は8月4日、鬼神野本道坪屋付近に迂回して間道を通り、渡川を守備していた宮崎新募隊の背後を攻撃した。