OTTAVA is a Japanese internet radio station specializing in classical music, launched in 2007. Based in Tokyo, it has grown to become one of the largest classical music broadcasters in Japan, reaching over one million listeners across 50 countries. The station offers 24/7 programming, blending classical music with nature sounds during many hours of the day.

In 2021, OTTAVA expanded its offerings by launching "Voice of the Planet", a 24-hour streaming service that mixes nature sounds with classical music. This unique channel aims to share the "beautiful melodies played by the earth" with listeners worldwide.

OTTAVA provides both free and paid streaming options, with premium members gaining access to on-demand content. The station also hosts webinars and seminars through its "OTTAVA Accademia" program, designed to deepen listeners' appreciation of music.

As Japan's only dedicated classical music internet radio, OTTAVA continues to innovate in its programming and delivery methods, maintaining its commitment to bringing high-quality classical music to a global audience.