He went to the capital from Kamakura to take over the position of his nephew Tokiuji HOJO, who became ill in April, 1230 and was appointed to Rokuhara Tandai Kitakata (Northern Chief of Rokuhara Tandai) in Kyoto.
寛喜2年（1230年）3月、病となった甥の北条時氏の後任を受けて鎌倉から上洛し、京都六波羅探題北方に就任。