Since the Nakahara clan also came to inherit Oi no kami, Chief of Oiryo holding juristiction over Kugoin, in the same manner, it was structured to appoint the Isobe clan as Azukari based on the recommendation ('Ryokeninpu' (document of appointment by a chief of bureau) for the Isobe clan, and 'Ryokegyojo' (document of recommendation by a chief of bureau) for the imperial court) by Oi no kami assumed by the Nakahara clan.
供御院を所管した大炊寮の長官である大炊頭も同様に中原氏が世襲するようになり、中原氏の大炊頭の推挙（磯部氏には「寮家任符」・朝廷には「寮家挙状」に基づいて磯部氏の預が任じられる構造となっていた。