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 was in the form of a permanent self. Dōgen believed enlightenment was possible in this life—even the secular life—and he did not believe in the idea of the Age of Dharma Decline. In East Asian Buddhism, there has been a strong focus on worship of the "bodhisattva" Avalokiteśvara. His cult originated in the northern borders of India, but he has been honoured for his compassion in many countries, such as China, Tibet, Japan, Sri Lanka and other parts of Southeast Asia, and among diverse levels of society. The text called the "Avalokiteśvara Sūtra" states that Avalokiteśvara will help anyone who