Key Facts
- Dates
- 2–6 January 1638
- Duration
- 5 days
- Result
- Rebel assault repulsed; defenders held the castle
- Context
- Part of the Shimabara Rebellion
Strategic Narrative Overview
Terazawa samurai suffered a severe defeat at Hondo Castle and retreated to Tomioka Castle. Between 2 and 6 January 1638, rebel forces launched multiple assaults on Tomioka Castle. Despite their numbers and recent momentum, the rebels were unable to overcome the fortification's defenses, and the garrison successfully repelled each attack.
01 / The Origins
The Shimabara Rebellion (1637–1638) arose from oppressive taxation and persecution of Christians in Kyushu, Japan. Following a successful uprising in Shimabara Domain, several thousand rebel peasants and rōnin crossed the sea to the Amakusa Islands, domain of the Terazawa family, to support local Christians who had simultaneously taken up arms against their lords.
03 / The Outcome
The rebel assault on Tomioka Castle was definitively repulsed, marking a setback for the Amakusa insurgents. The survivors among the Terazawa samurai retained control of Tomioka Castle. The wider Shimabara Rebellion was ultimately crushed by Tokugawa shogunate forces in April 1638, ending large-scale Christian resistance in Japan and triggering intensified national isolation policies.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.