Risshō Kōsei Kai (立正佼成会); until June 1960, 大日本立正交成会 (Dai-Nippon Risshō Kōsei Kai) is a Japanese new religious movement founded in 1938 by Nikkyō Niwano and Myōkō Naganuma. Risshō Kōsei Kai is organized as a lay Buddhist movement, which branched off from the older Reiyūkai, and is primarily focused around the Lotus Sutra and veneration of ancestors.