It is said that although it is of the Bosatsu grade in order to benefit Shaka's teaching, once it became Buddha it was called Ryushu-nyorai, Daishin-butsu or Shinsen-butsu and will become Buddha (called Fuken-nyorai) in the future.
釈迦の化導を扶助するために菩薩の地位にあるが、かつては成仏して龍種如来、大身仏、神仙仏などといったといわれ、また未来にも成仏して普見如来という。