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,
Pure Land Buddhism and form an important component of the Mahāyāna Buddhist traditions of China, Japan, Korea, Tibet and Vietnam. The term "Pure Land Buddhism" is used to describe both the Pure Land soteriology of Mahayana Buddhism, which may be better understood as "Pure Land traditions" or "Pure Land teachings," and the separate Pure Land sects that developed in Japan from the work of Hōnen. Pure Land Buddhism is built on the belief that we will never have a world which is not corrupt, so we must strive for re-birth in another plane, referred to as the "Pure Land". The Pure Land teachings