On that day, backed by Terumoto MORI, Yoshimune OTOMO, who had joined the West with aspirations to rebuild the family fortune, moved his army into the Bungo Province and siege Kitsuki-jo Castle of Tadaoki HOSOKAWA who belong to the East.
同日、再興を目指して西軍に与した大友義統が毛利輝元の支援を受けて豊後に攻め込み、東軍の細川忠興の飛び地である杵築城を包囲攻撃した。