Kakukei

...This is a debate held in the Imperial Court in 963 (Owa 3) between scholars of the Tendai and Hosso sects on the issue of whether all can attain Buddhahood and whether the two vehicles cannot attain Buddhahood. Emperor Murakami held a Lotus Sutra ceremony at Seiryoden for five days and ten sessions from August 21 to 25, inviting ten high priests from each of the Nanto and Hokurei sects. At the evening session on the second day, the questioner, Kakukei of Tendai, claimed that all things can attain Buddhahood, while the lecturer, Hozo of Todaiji, countered from the Hosso sect's point of view that only bodhisattvas and some of the Fujio can attain Buddhahood, resulting in a debate. The heated debate continued for the evening session on the fifth day, and became the largest sectarian debate in history on the issue of whether all things can attain Buddhahood or not, but no winner was decided. Chuzan of the Hosso sect, who played an active role, was given a reward, and Ryogen of Tendai was listed as one of the Ten Zen Masters of the Imperial Service the following year.

*Some of the terminology that refers to "Kakukei" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…963年(応和3)に宮中で，天台･法相（ほつそう）両宗の学匠が一切成仏（いつさいじようぶつ）･二乗不成仏をめぐって行った論議をいう。村上天皇は，8月21日から25日までの5日10座，南都北嶺の高僧各10人を清涼殿に招き法華会を催したが，その第2日夕座（ゆうざ）に問者であった天台の覚慶は，一切すべてのものが成仏できると主張したのに対し，講師であった東大寺の法蔵が，成仏できるのは菩薩と不定（ふじよう）の一部に限定されると法相宗の立場から反論して論争となった。激論は第5日夕座に及び，成仏不成仏論では史上最大規模の宗論となったが勝敗は決せず，活躍した法相宗の仲算は恩賞を賜り，天台の良源は翌年内供奉十禅師の一員に列せられている。…

※「覚慶」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