6 books in this genre
Mikkyō no shōchō sekai
Hatta, Yukio
Sanmayakai jo himitsu Sanmaya Bukkaigi
Ryōsei Fukuda
Shingonshū shōjiten
Kindai Kōyasan no gakumon
Masatane Miwa
Kobo Daishi no ningengaku
Seiichi Kato
Shingon mikkyō no reikonkan
Senchō Saeki
