In Kamakura bakufu, after the death of the fifth regent Tokiyori HOJO, whose heir Tokimune HOJO was too young, Nagatoki HOJO from a branch line became the sixth regent, who was succeeded by the seventh regent Masamura HOJO, and then Tokimune HOJO finally reached the age of manhood and supported Masamura as rensho (assistant to regents).
鎌倉幕府は5代執権北条時頼没後その嫡男北条時宗が若年のため傍系の6代北条長時、ついで7代北条政村が執政し、これを漸く成年に達した連署の北条時宗らが補佐する体制が敷かれていた。