Ichijo Opening Ceremony - Ichijo Kaie

…The teachings of Mahayana sutras such as the Lotus Sutra, the Sūtra, and the Kegon Sutra, especially the Lotus Sutra (the Expedient Means Chapter), are famous for clarifying that the teachings of the Three Vehicles are provisional and expedient, that only the teachings of the One Vehicle are true, and that the teachings of the Three Vehicles ultimately belong to the One Vehicle. This is called the Opening of the One Vehicle in the Lotus Sutra. Since the Tang Dynasty in China, there have been repeated debates between the Tendai and Kegon sects and the Hosso sects over the expedient and true teachings of the Three Vehicles and the One Vehicle, and this is called the Three-One Provisional and True Controversy. …

*Some of the terminology explanations that refer to "Ichijo Kaikai" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…法華･勝鬘･華厳等の大乗経典の所説で，とくに《法華経》(方便品)は，三乗の教えを方便の権説とし，一乗の教えのみが真実説であり，三乗教も究極的にはこの一乗教に帰するものであることを明らかにしたので有名。これを《法華経》の〈一乗開会（かいえ）〉という。中国唐代以来，天台宗･華厳宗と法相宗との間で，三乗･一乗の方便･真実を争う議論がくりかえされ，これを三一権実論争という。…

※「一乗開会」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報