Reiyūkai (霊友会 Spiritual-Friendship-Association?), or Reiyūkai Shakaden, is a Japanese Buddhist new religious movement founded in 1925 by Kakutarō Kubo (1892-1944) and Kimi Kotani (1901-1971). It is a lay organization (there are no priests) associated with Nichiren Buddhism.
Reiyūkai considers itself the grandfather of lay-based new religions devoted to the Lotus Sutra and ancestor veneration.
Reiyūkai membership currently stands at 5.14 million members, with the majority living in Japan.
In 1920s, during the crisis after the 1923 Great Kantō earthquake and the following economic depression, Kakutaro Kubo begins formulating his philosophy for what is now Reiyūkai. He compilies and published The Blue Sutra (a collection of texts from the Threefold Lotus Sutra), used by members for recitation practice.
In 1930, Reiyūkai was inaugurated, Kakutaro Kubo became Chairman of the Board of Directors and Kimi Kotani becomes President. In 1937, headquarters were established the Iikura area, Tokyo. In 1954, the Reiyūkai Youth Group was inaugurated.
In 1971 Kimi Kotani died and Tsugunari Kubo became president. The next year, a Reiyūkai Centre was established in the United States. It was followed by centers in Brazil and Canada (1975); the Philippines (1976); Mexico, Italy, and Taiwan (1977); United Kingdom (1978, closed as of March 1998); Peru, Thailand, and France (1979); India, Nepal, and Paraguay (1983); Spain (1984); Korea (1988); Bolivia (1996) and Sri Lanka (1999). In 1980, the Reiyūkai’s Inner Self Development campaign began.
In 1985, representatives from 14 countries participated in a Youth Speech Festival in commemoration of United Nations International Youth Year. Since then, national festivals are held annually throughout the world and international festivals are held in the Asian, American and European regions on a regular basis.