After the outbreak of Seinan War, KAWAJI fought at various places in Kyushu region as a brigade commander (Army Major General) of Betsudo-Daisan-ryodan (third stand-alone brigade) composed of Keishi-cho commissaries.
開戦後、川路は警視庁警視官で編成された別働第3旅団の旅団長（陸軍少将）として九州を転戦した。