As a result, he had the eastern part of the Katsushika district under his control, and in 1548, he issued a deed to 'prohibit Shugo (governors) to enter (his) territory' to Nakayama Hokekyo-ji Temple to strengthen his foundation as the local feudal lord.
その結果、葛飾郡東部一帯を支配下に置き、天文_(元号)17年（1548年）に中山法華経寺に対しても「守護不入」の証文を発給するなど地元領主としての基盤を固めた。