Kamakura Shogunate Establishes Anti-Mongol Diplomatic Stance (1246)

Timeline

1. 1246Kamakura · KantōAfter Hōjō Tsunetoki's death, his brother Hōjō Tokiyori became regent in March 1246. Former shogun Kujō Yoritsune and Nagoe Mitsutoki conspired to overthrow the shogunate; Tokiyori, aided by Adachi Kagesuke, struck first, and Yoritsune's faction was defeated. With the coup crushed, Hōjō control of the shogunate grew firmer, clearing obstacles for later unilateral diplomatic and military decisions.
2. 1247Kamakura · KantōIn 1247 Tokiyori allied with the Adachi clan to attack the powerful gokenin Miura clan, which was annihilated during the Hōgen Disturbance. This removed warrior forces threatening Hōjō autocracy and further strengthened gokenin dependence on the shogunate. The purged system enabled a unified front refusing to reply to the Mongol letter of 1268.
3. 1249–1252Kamakura · KantōTokiyori established the hikitsuke (monchūjo) in 1249 to adjudicate gokenin land disputes, and in 1252 replaced the shogun with imperial prince Munetaka, further consolidating Hōjō autocracy. Once the shogunate's deliberation system matured, handling foreign envoys required Kamakura consensus; the later silent rejection of the Mongol letter operated through this system, with court diplomatic authority effectively resting with the shogunate.