According to the fifteenth phrases of the jujiyujuppon (Emerging from the Earth), chapter 15 of the "Hokekyo," when Shaka Nyorai (Shakyamuni) was preaching, a crack appeared in the ground and then many Bosatsu emerged from it, which are called collectively "jiyu no Bosatsu" (Bosatsu appearing from underground).
『法華経』の第15章にあたる従地涌出品（じゅうじゆじゅっぽん）第十五の記述によれば、釈迦如来が説法をしていた際に大地が割れ、そこから無数の菩薩が涌き出た（これを総称して地涌の菩薩と称す）。