Although Shisho (people who performed miscellaneous duties about documents) of Oiryo was appointed to Azukari (an additional post to the chief of Naizenshi) of Kugoin, but after Hironobu ISOBE was appointed to Azukari in 1002, the Isobe clan inherited a post of Azukari and the right to control Miineta for 15 generations equivalent to about 300 years.
大炊寮史生が供御院の預(官職)に任じられていたが、長保4年（1002年）に磯部広信が預に任じられて以後、15代300年余りにわたって磯部氏が預職とともに御稲田の支配権を世襲した。