In 1573, Yoshiaki ASHIKAGA on the government side took up arms against Nobunaga ODA, and took refuge in Makishima-jo Castle counting on Akimitsu MAKISHIMA who was a bakufu bugyoshu (group of magistrates).
1573年（天正元年）、時の公方足利義昭は織田信長に対して兵を挙げ、幕府奉行衆であった真木島昭光を頼り槇島城へ籠城した。