In February 1864, while he was staying in Osaka to guard Iemochi TOKUGAWA, a few repined masterless samurai intruded into a kimono fabrics dealer called 'Iwaki Shoya,' and both Toshizo HIJIKATA and Sannan rushed to the scene and repelled them after a fierce battle.
元治元年1月、徳川家茂警護のため大阪滞在中、高麗橋そばの呉服商「岩城升屋」（岩木とも）に不逞浪士数名が押し入った際、土方歳三・山南両名が駆けつけて激しい戦闘の末に撃退した。