It is considered that the area of Zoyakumen kei shoen was bigger than that of Kikonchi kei shoen or Kishinchi kei shoen (shoen originated from donated land) because the certification of kokuga was easily obtained.
ただし、国衙からの許可を受けやすく、既墾地系荘園や寄進地系荘園よりも広かったと考えられている。