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,
Faith in Buddhism not exist in Buddhism. However, worship of deities has often been considered a form of superstition or a form of skillful means to guide the unenlightened to a better life, and not much more than that. In the history of the diffusion of Buddhism, the relation between Buddhism and local deities was an important aspect of success, but Buddhists have often denied this because of local movements for orthodoxy. Furthermore, scholars have paid little interest to the role of local deities, since it is not covered by any of the standard academic disciplines studying Buddhism, such as Buddhist studies or