This is a new religious Japanese Buddhist movement or shinshukyo which uses common beliefs and elements as associated with Nichiren and Reiyukai concerning ancestor worship and the Lotus Sutra which I have previously written about in these two posts.
Religions of the world: a comprehensive encyclopedia of beliefs and practices/ J. Gordon Melton, Martin Baumann, editors; Todd M. Johnson, World Religious Statistics; Donald Wiebe, Introduction-2nd ed., Copyright 2010 by ABC-CLIO, LLC. Reproduced with permission of ABC-CLIO, Santa Barbara, CA.