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 compiled and published The '' Blue Sutra '' ( a collection of texts from the Threefold Lotus Sutra ) , used by members for recitation practice
1923 Great Kantō earthquake
1923 Great Kantō earthquake
Reiyūkai