He attacked at night and defeated a shogunate fleet moored in the sea near Suo-oshima Island, and recaptured the island in cooperation with other corps, such as the second Kiheitai unit led by Hanshichi HAYASHI.
周防大島沖に停泊する幕府艦隊を夜襲してこれを退け、林半七率いる第二奇兵隊等と連絡して周防大島を奪還。