National Astronomical Observatory of Japan



The Mitaka Campus is the headquarters of NAOJ (National Astronomical Observatory of Japan) in Mitaka, Tokyo. Our institute promotes astronomical research in Japan and holds regular events and open campus as an open research institute.

2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Opening hours
10:00 a.m. to 5:00 p.m. (the admission is until 4:30 p.m. ). For more detail information, please see visit guide.
For researchers and business associates
As a part of the enhanced security plan for NAOJ, from December 1st, 2017, Security Access Control System will be implemented to control access to buildings and labs at the Mitaka campus. For details, please refer to “Regarding implementation of the Security Access Control System for NAOJ Mitaka Campus buildings and laboratories
Mitaka campus