However in the following year, Zeze-jo Castle was constructed by order of Ieyasu under Tenkabushin (construction order by the Tokugawa shogunate) by reason that Otsu-jo Castle was not suitable as a castle, and Kazuaki moved to the Zeze Domain.
しかしその翌年、大津は城としてふさわしくないという理由から、家康の命令で天下普請のもと、膳所城が築かれ、一西は膳所藩に移ることとなった。