Since the time when OE no Hiromoto's son, Tokihiro NAGAI, became jito (manager and lord of a manor) during the Kamakura Period, the Nagai family had handed down the post down through successive generations and gradually expanded its control over the manor through repeated legal action against Todai-ji Temple, but Emperor Godaigo confiscated the manor during the period of the Northern and Southern Courts and redonated it to Todai-ji Temple.
鎌倉時代に大江広元の子の長井時広が地頭になり、代々これを相続、東大寺と訴訟を繰り返して勢力を拡大するが、南北朝時代(日本)に後醍醐天皇が没収し、東大寺に再寄進した。