It is thought that these Bosatsu were not the Bosatsu who were doing Bosatsu-gyo practice for the enlightenment of themselves, but the Nyorai, who had gotten enlightenment and entered the spiritual realm of Buddhahood, came to the Kukai (nine various realms except the Buddhahood) to give relief to the mappo days, called Daibosatsu (great Bosatsu).
この場合、自らの解脱の為に菩薩行を行なう菩薩ではなく、悟達し既に仏界へ昇った如来が末法救済のために九界へ降り立った大菩薩であるとされる。