Shōmyō (声明?) is a style of Japanese Buddhist chant, used mainly in the Tendai and Shingon sects. There are two styles: ryokyoku and rikkyoku, described as difficult and easy to remember, respectively.

Shōmyō, like gagaku, employs the Yo scale, a pentatonic scale with ascending intervals of two, three, two, two, and three semitones.

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... Shōmyō (声明?) is kind of Buddhist song which is an added melody for a sutra ... Shōmyō came from India, and it began in Japan in the Nara period ... Shōmyō is sung a capella by one or more Buddhist monks ...