In the Muromachi period, the Shin clan supported the Yamana clan and became a member of Hokishu (the local clans of Hoki Province); at the Onin War, they fought as Hokishu and made achievements, and as a result, they were appointed as Shugodai (deputy of Military Governor) of Hoki Province as well as the Nanjo clan.
室町時代には山名氏のもとで伯耆衆の一員になり応仁の乱に参加、その功によって進美濃守は南条氏と共に伯耆守護代に任じられた。