Description: The Nobeyama Radio Observatory is a division of the National Astronomical Observatory of Japan (NAOJ) under the National Institutes of Natural Sciences (NINS). NRO operates powerful, advanced radio telescopes such as the 45 m radio telescope, the Nobeyama Millimeter Array (NMA), ASTE Submillimeter Telescope at Chile, and the Nobeyama Radioheliograph. A large number of scientists from around the world visit NRO to use these telescopes for researches in astronomy and astrophysics. Maintenance, upgrades, and new technical innovations are ceaselessly made all year round. In 1994, NRO discovered the exit of black hole which was the human's first time observed directly.