Tokugawa Ieyasu / 德川家康

Tokugawa Ieyasu / 德川家康 appears in 14.武士威廉：大航海时代的日本和西方 as the Japanese ruler who recognizes the practical value of [[WilliamAdams|William Adams / 三浦按针]] after Adams reaches Japan in 1600. The episode places their meeting on the eve of the [[SekigaharaBattle|Battle of Sekigahara]], when Ieyasu is consolidating power against the Toyotomi-aligned coalition.

The source presents Ieyasu as open to foreign trade and technical knowledge but increasingly alert to Christian and Iberian political risk. He uses Adams’s explanations of European conflict to assess [[Jesuits|Jesuit]] accusations, later grants Adams land and samurai status, asks him to build Western-style ships, and uses him as a diplomatic adviser. The same ruler eventually expels Jesuits in 1614, making him the central figure in Tokugawa Foreign-Trade Ambivalence.

Key Claims

• Ieyasu does not accept the Jesuit framing of Adams and the Dutch/English survivors as simple pirates; he interrogates the wider European conflict.
• His interest in Adams is practical: navigation, astronomy, geometry, shipbuilding, diplomacy, and trade matter to statecraft.
• The episode treats the claim that Adams’s ship cannon affected Sekigahara as uncertain and source-scoped.
• Ieyasu’s openness is bounded by regime security; his 1614 expulsion of Jesuits marks the turn from opportunistic trade toward religious-political control.

Connections

• [[WilliamAdams|William Adams / 三浦按针]] - foreign adviser and samurai retainer.
• Tokugawa Shogunate / 德川幕府 - regime order associated with Ieyasu’s victory and successors.
• [[SekigaharaBattle|Battle of Sekigahara]] - decisive battle context.
• Jesuits / 耶稣会 - missionary network Ieyasu increasingly views as a threat.
• Tokugawa Foreign-Trade Ambivalence, Early Modern Japan-Europe Contact, and Sakoku Dutch Window - policy concepts attached to the source.