After the Jokyu War (the war in the Jokyu era), when the imperial court was going to decide an imprtant matter, it became basically necessary for the imperial court to get its persmission from the bakufu through the Kanto moshitsugi, and its power increased: For example, when the battle betwwen Daikakuji-to (imperial lineage starting with Emperor Kameyama) and Jimyoin-to (imperial lineage from Emperor Gofukakusa to Emperor Gokomatsu) became serious concerning the imperial succession problem, the imperial succession problem or personel affairs in the imperial court became to be seriously affected by opinions of Kanto moshitsugi.
承久の乱以後、原則として朝廷の重要事項の決定には関東申次を経由して幕府の許可を得る事になっており、大覚寺統と持明院統による皇位継承争いの激化に伴って、皇位継承問題や宮中の人事の是非も関東申次の一存がその帰趨を握るようになり、その権威は大きくなっていった。