In the afternoon of January 27, 1868, a quarrel between the inspector general, Tomoaki TAKIGAWA and the soldiers of the Satsuma domain blocking the highway near Shimotoba resulted in a battle, and as soon as gunfire in Toba was heard, the battle in Fushimi began.
慶応4年正月3日（1868年1月27日）の夕方に、下鳥羽付近で街道を封鎖する薩摩藩兵と大目付の滝川具挙の問答から軍事的衝突が起こり、鳥羽での銃声が聞こえると伏見でも衝突、戦端が開かれた。