In 1532, he seized Nagoya-jo Castle (那古野城) (Naka Ward, Nagoya City, later Nagoya-jo Castle (名古屋城)) which was considered as Ujitoyo IMAGAWA's castle, and he moved to the castle to expand his power in Aichi District (current Nagoya City, Aichi Prefecture) (However, there is a theory that the year of taking Nagoya-jo Castle is 1538).
天文(元号)元年（1532年）、今川氏豊の居城とされる那古野城（名古屋市中区(名古屋市)、のちの名古屋城）を奪い、ここに居城を移して愛知郡(愛知県)（現在の名古屋市域周辺）に勢力を拡大した（ただし那古野城奪取については1538年説もある）。