However, the loss of the Emperor's authority after the Jokyu War (1221) was remarkable, and like diplomatic efforts against Genko (Mongol invasion attempts against Japan) and foreign trade, sending ships to Tang, they were both lead by the Kamakura Bakufu, and showed the unity of power amongst Buke.
しかし承久の乱（1221年）以降の天皇の権威の失墜は著しく、元寇に当たっての外交的処理や唐船派遣などの外国貿易など、いずれも鎌倉幕府の主導の下に行われており、武家一元化の動向を示していた。