Since knowledge of mathematics was required, persons from Sando (study of mathematics) of Daigakuryo (Bureau of Education under the Ritsuryo system) played active roles like Sanhakase (Doctor of Numbers) concurrently took a position as Kami (Director) or Suke (Deputy Director).
数学知識が必要となるため､頭か助は必ず算博士が兼ねるなど大学寮の算道出身者が活躍した。