Mongol Invasions of Japan and the Kamakura Defense (1274–1281)

1. Hōjō Tokimune becomes shikken (regent)

   Jan 1, 1268Labels: H j, Kamakura regency

   Hōjō Tokimune assumes the role of shikken (Kamakura regent), becoming the central political-military decision-maker who would direct preparations against the Yuan-Mongol threat.

   • Britannica

2. First Yuan diplomatic letter reaches Dazaifu

   Feb 8, 1268Labels: Dazaifu, Yuan envoys

   Envoys associated with Yuan and Goryeo deliver Kublai Khan’s letter to Japan via Dazaifu (Kyushu’s key defense/diplomacy hub). The shogunate forwards it onward, but Japan sends no reply—setting the stage for coercive escalation.

   • Natl Archives JP

3. Kublai Khan proclaims the Yuan dynasty

   Jan 1, 1271Labels: Kublai Khan, Yuan dynasty

   Kublai Khan formally establishes the Yuan dynasty in China, strengthening the institutional base for major overseas expeditions and renewed diplomatic pressure on Japan.

   • Britannica

4. Yuan-Goryeo force attacks Tsushima

   Oct 5, 1274Labels: Tsushima, Yuan-Goryeo forces

   The first invasion begins with an assault on Tsushima, a strategic stepping-stone between Korea and Kyushu. The island’s fall opens the route toward Iki and Japan’s main islands.

   • Britannica

5. Battle of Bun’ei at Hakata Bay

   Nov 4, 1274Labels: Hakata Bay, Battle of

   Invaders land at Hakata Bay and fight Kamakura forces in the campaign’s decisive engagement on Japan proper. The landing demonstrates the vulnerability of Kyushu’s coastline and the need for permanent defenses.

   • Wiki Bun ei
   • Britannica

6. Yuan-Goryeo forces seize Iki Island

   Nov 13, 1274Labels: Iki Island, Yuan-Goryeo forces

   After Tsushima, invaders land on Iki and defeat local defenders, securing another forward base and intensifying the immediate threat to northern Kyushu.

   • Britannica
   • Wiki Iki

7. Typhoon forces 1274 invasion withdrawal

   Nov 19, 1274Labels: kamikaze, storm withdrawal

   A major storm (later memorialized as kamikaze, “divine wind”) damages the invasion fleet and contributes to the attackers’ decision to withdraw, ending the first expedition without conquest.

   • Britannica
   • Wiki Bun ei

8. Kamakura orders Genkō Bōrui coastal defenses

   Mar 1, 1276Labels: Genk B, Kamakura shogunate

   In response to 1274, the shogunate initiates construction of the Genkō Bōrui—a long stone-and-earth defensive line along Hakata Bay—to hinder future mass landings and improve coastal readiness.

   • Wiki Genk
   • Fukuoka City

9. Eastern Route Army sails for second invasion

   May 1, 1281Labels: Eastern Route, Goryeo

   For the 1281 campaign, a large Eastern Route Army departs from Goryeo, moving via Tsushima and Iki toward Kyushu. This marks the opening phase of the second, much larger, invasion attempt.

   • Wiki K an
   • Nippon com

10. Second invasion battle begins at Hakata Bay

    Jun 8, 1281Labels: K an, Hakata Bay

    Fighting at Hakata Bay resumes in the Kōan campaign. Completed sections of the Genkō Bōrui and organized local defense constrain landings and push invaders toward ship-based operations and exposed anchorages.

    • Wiki K an
    • Wiki Genk

11. Southern force arrives; fleets concentrate off Kyushu

    Jul 16, 1281Labels: Southern force, invasion fleet

    The campaign’s second major element—the southern expeditionary force—arrives, and the two invasion forces attempt to coordinate. This concentration creates a massive fleet vulnerable to weather and sustained Japanese raiding.

    • Wiki K an

12. Typhoon devastates the 1281 invasion fleet

    Aug 15, 1281Labels: typhoon 1281, kamikaze

    A powerful late-summer storm wrecks a significant portion of the Yuan-led fleet. Combined with Japanese resistance, the disaster compels abandonment of the invasion and becomes central to later “kamikaze” memory.

    • Wiki K an
    • Britannica

13. Takezaki Suenaga completes invasion scroll account

    Jan 1, 1293Labels: Takezaki Suenaga, M ko

    The warrior Takezaki Suenaga’s Mōko Shūrai Ekotoba (Illustrated Account of the Mongol Invasions) records experiences from 1274 and 1281 and provides a major near-contemporary visual-textual source for Kamakura-era defense and warfare.

    • Wiki Ekotoba