Buddhism in Japan began teaching devotion to the "Lotus Sutra". Eventually, his disciples formed their own school of Nichiren Buddhism, which includes various sects that have their own interpretations of Nichiren's teachings. Nichiren Buddhism established the foundation of Japanese Buddhism in the thirteenth century. The school is known for its sociopolitical activism and looks to reform society through faith. In the Muromachi period, Zen, particularly the Rinzai school, obtained the help of the Ashikaga shogunate and the Emperor of Japan, and accomplished considerable development. After the Sengoku period of war, Japan was re-united in the Azuchi–Momoyama period. This decreased the power of Buddhism,
Buddhism in Japan The Kegon school was founded by c. 600 and was introduced to Japan by the Indian monk Bodhisena in 736. The "Avatamsaka Sutra" ("Kegon-kyō" 華厳経) is the central text for the Kegon school. The "Shin'yaku Kegonkyō Ongi Shiki" is an early Japanese annotation of this sūtra. 753: Jianzhen () introduces the Risshū (Ritsu or vinaya school) to Japan. Founded by Daoxuan (道宣, Jp. "Dosen"), China, c. 650 First Introduction to Japan: Jianzhen, 753. The Ritsu school specialized in the Vinaya (the monastic rules in the Tripitaka). They used the Dharmagupta version of the vinaya which is known in Japanese as