After traveling to Tang China to study, Kukai was the founder of the Shingon school of Buddhism. See how his return to a politically fraught Japan created the opportunity to spread his teachings.
And became the student of a esoteric 
Buddhist master, Huiguo.
y se hizo alumno del maestro
del budismo esotérico, Huiguo.
Ele se tornou estudante
do budista, Huiguo.