On March 26, Sangun Kuroda deployed the detached 1st brigade in the left flank, the detached 2nd brigade in the center, and the Keishi-tai troop in the right flank, and attacked the Satsuma army in the Kogawa area from the three directions under cover of naval bombardment and seized Kogawa by driving back the Satsuma army after a fierce battle.
3月26日、黒田参軍は別働第1旅団を左翼、別働第2旅団を中央、警視隊を右翼に配し、艦砲射撃の援護のもと三方から小川方面の薩軍を攻撃し、激戦の末、薩軍を撃退して小川を占領した。