Mikkyō
Mikkyō (Japanese: 密教, romanized: mikkyō, from Japanese: 秘密仏教, romanized: himitsu bukkyō, lit. 'secret Buddhism'), or Japanese Esoteric Buddhism, is the lineage of Vajrayana Buddhism transmitted to Japan, primarily in the early Heian by Kūkai, and to a later extent by Saichō and his successors such as Ennin. It consists of complex systems of icons, meditative rituals, and ritual languages distinct from the exoteric (kengyō, 顕経) schools.