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,
Southern, Eastern and Northern Buddhism Southern, Eastern and Northern Buddhism "Southern Buddhism", "Eastern Buddhism" and "Northern Buddhism" are geographical terms sometimes used to describe the styles of Buddhism practiced in Asia. "Southern Buddhism" represents Buddhism as practiced in Sri Lanka and countries in mainland Southeast Asia, especially Myanmar (Burma), Thailand, Laos, and Cambodia. This group is primarily connected by the Pāli Canon, monasticism and its prevalent monastic rules, and ritual practices. Southern Buddhism tends to be in agreement that the canonical Pali scriptures and commentaries are considered its textual authority, and a strong monastic tradition along with the ideal of renunciation (considered the best way