In the entry for the 26th day of the 12th month of the 2nd year in the Katei era in the lunar calendar (corresponds to January 31, 1237), it is described 'A record of the appointment ceremony held on 18th arrived. Yasutoki HOJO was concurrently appointed Left City Acting Commissioner. Morokazu was appointed Head of the Bureau of Taxation.'
1236年（嘉禎2年）12月26日条に「去る十八日の除目の聞書到着す。武州（北条泰時）左京権大夫を兼ね給う。師員主計の頭に任ず」とある。