It is considered that Yoshimichi SUDO and Toshimichi lived at Yamanouchi which was northern part of the Kamakura County in the Sagami Province around the same time of the establishment of Yamanouchi no sho manor which was a large shoen whose honjo (proprietor or guarantor of manor) was Hachijoin (the Imperial Princess Shoshi).
首藤義通・俊通が相模国鎌倉郡北部の山内に住したのは、八条院を本所とする大規模荘園、山内荘の成立と同時と見られている。