Daigensuihō

[1] In the year 839, the monk Jōgyō, a disciple of Kūkai, introduced the Imperial Court to the procedures of the Daigensuihō as part of the systematic importation of Tang esoteric practices.

Jōgyō's promotion of Daigensuihō put him in direct conflict with Ennin of the Tendai sect who instead lobbied for the implementation of the Rite of Prajvalushnisha (熾盛光法, Shijōkōhō) as the ritual of national defense.

[2] The Daigensuihō was originally formulated as a prayer for "defense from foreign invasion" (外寇からの防衛, Gaikō kara no bōei) and the "capitulation of enemy nations" (敵国降伏, Tekikoku kōfuku) and was therefore performed only in the immediate presence of the Emperor.

In the Chōtoku Incident [ja] of 995, Interior Minister Fujiwara no Korechika was banished from the capital and relegated to a post in the Dazaifu on the pretext that he had conducted the Daigensuihō himself.

Later, during the Pacific War, the Daigensuihō was carried out for the last time in an invocation of a curse upon the Allied powers (連合国調伏, Rengōkoku chōbuku) by the Imperial Japanese Army.