The oldest record on the Shin clan is about Fumi-sho Manor in Hoki Province which had been possessed by Kajo-ji Temple of Yamashiro Province; according to the article, in 1345, SHIN no Saburo Nyudo (priest Chokaku) tried to take Ryokeshiki (an economical right as a lord of a manor); Fumi-sho Manor was located near present Yonago City.
文献に見える一番古い記録は興国6年（貞和元年、1345年）の山城国嘉祥寺領伯耆国布美庄に関するもので進三郎入道長覚が領家職を押領しようとしたとの記録が最古である（布美庄は現在の米子市付近に位置していた）。