National Astronomical Observatory of Japan

The National Astronomical Observatory of Japan is a research institute and astronomical observatory in Mitaka that spreads across a large campus with telescope installations and scientific buildings. The facility includes several observation domes, libraries, and spaces for public education programs, all connected by walkways between mature trees.

The facility formed in 1988 by merging three older research stations focused on astronomy and atmospheric science. Since then it expanded its international partnerships and built additional instruments, including telescopes outside Japan.

Visitors walk among working telescope domes and exhibition halls that explain ongoing research projects using photographs and diagrams from active missions. The campus also houses offices where research teams analyze data from collaborations worldwide and prepare findings for publication.

The grounds open at 10 in the morning and close at 5 in the afternoon, with last entry half an hour before closing. Some areas with ongoing research work are not accessible to the public, and signs guide visitors along the recommended route.

The grounds contain a historic refractor telescope from the early 20th century that is still used for viewing and occasional observations. The facility also operates a supercomputer that runs complex simulations of galaxy formation.

Location: Mitaka

Inception: 1988

Website: https://nao.ac.jp/en

GPS coordinates: 34.57610,133.59400

Latest update: December 5, 2025 22:25