Kukai returned to Japan.
He decided to live in the TAKAOSANJI temple.
Kukai who held the ceremony of the esoteric Buddhism to pray for the security and prosperity of Japan came to be admitted from the court in 810.
He held a big ceremony to tell esoteric Buddhism, and the number of apprentices increased in 812.
He established the religious sorority that propagated teaching buddhism in 813.
Kukai traveled nationwide with apprentices, helped embarrassed people, and made buddhism known.
Kukai was trusted from the SAGATENNO emperor very much, and obtained permission to make the gym for the training of buddhism in Koyasan.
He built the KONGOBUJI temple in 819. It was after several decades to complete all buildings.
The SAGATENNO emperor ordered Kukai to complete To-ji Temple in Kyoto in 823.
Kukai made To-ji Temple a work stand and made buddhism known further.
After leaving TOJI, JINGOJI, and TODAIJISHINGONIN to apprentices, Kukai started training that did not eat grain in 835.
And, he promised, "I watched all living things until Miroku Bosatsu was able to come out in this world in 5.67 billion years", and disappeared.
The work that Kukai accomplished was praised, and the DAIGOTENNO emperor gave him the name of Kobodaishi in 921 afterwards.