水戸徳川と尊皇刀剣文化

The Mito domain's centuries-long compilation of the Dai Nihon-shi, the great history of Japan, and the school of thought it engendered—known as Mito-gaku—provided the most philosophically sophisticated articulation of the Japanese sword as national spiritual essence. Scholars Fujita Yūkoku, Aizawa Seishisai, and Fujita Tōko developed the concept of kokutai (national polity) centered on unbroken imperial lineage, within which the Japanese sword occupied a uniquely charged symbolic position as the material embodiment of Japanese martial and spiritual identity. Lord Tokugawa Nariaki (1800–1860), the passionate Mito lord who was the living embodiment of late Mito-gaku, promoted swordsmanship, supported domain smiths, and bestowed famous blades on loyalist activists as tangible expressions of ideological solidarity. The Sakuradamon Incident (1860), in which Mito samurai using domain-supplied swords assassinated Great Elder Ii Naosuke, dramatized the terrifying fusion of Mito-gaku ideology and the sword as an instrument of political violence. Simultaneously, nativist (kokugaku) thinkers Motoori Norinaga and Hirata Atsutane reinforced the sacralization of the sword through Shinto restoration theology, identifying the blade as a vessel for divine spirits and connecting ancient ritual sword-worship to contemporary nationalist ideology. This intellectual tradition flowed directly into the Meiji-era 'bushidō' discourse, Nitobe Inazō's 1900 Bushidō treatise, and ultimately the militarist sword mysticism of the Shōwa period—making Mito-gaku one of the most consequential intellectual forces in the entire history of Japanese sword culture.