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A public observatory in an International Dark Sky Community, showcasing the wonders of the stars through a 101 cm telescope and 3D imagery.
Located on a hill in Bisei, Ibara City, Okayama Prefecture, Bisei Astronomical Observatory is a public observatory where visitors can observe celestial objects and explore exhibits about space both day and night. In 2021, Bisei became the first community in Asia to be certified as an International Dark Sky Community, and ongoing efforts are being made to preserve its starry skies.
The centerpiece of Bisei Astronomical Observatory, which opened in 1993, is a reflecting telescope with a 101 cm aperture. On clear nights, visitors can observe seasonal celestial objects such as lunar craters, Saturn’s rings, and Jupiter with guidance from expert staff. Stargazing sessions using large binoculars and other equipment are also held on the observation deck beside the dome, offering views of the night sky overhead.
Inside the observatory, the Star Wall displays astronomical photographs and videos of space. The 4D2U 3D visualization system provides an opportunity to learn about the structure of the universe and the movement of celestial bodies. On clear days, visitors may also be able to observe first-magnitude stars during daylight hours. Even in poor weather, they can explore video exhibits and attend informative presentations. Seasonal astronomy events offer different perspectives on the universe depending on the time of year.
The dome beneath a sparkling winter sky
Observing celestial objects through the reflecting telescope with a 101 cm aperture
A guided stargazing session on the observation deck at Bisei Astronomical Observatory
The structure of the universe presented in 3D using the 4D2U system at Bisei Astronomical Observatory
Astronomical photographs displayed on the Star Wall at Bisei Astronomical Observatory (Mitaka: ©2005-2023 Tsunehiko Kato, National Astronomical Observatory of Japan 4D2U Project)
Bisei Astronomical Observatory also offers daytime observations of first-magnitude stars when the sky is clear
Frequently Asked Questions have been vetted and answered directly by each listing.
Q
Are reservations required for observation sessions at Bisei Astronomical Observatory?
Reservations are not required for regular observation sessions. However, some events require advance reservations. Priority tickets are also available for observations with the 101 cm telescope, so check the official website for details.
Q
Is there anything to do on rainy or cloudy days?
Even when poor weather prevents stargazing, visitors can learn about space through screenings using the 4D2U 3D visualization system and presentations about the telescope.
Q
Can I visit if I do not understand Japanese?
Explanations inside the observatory are generally available only in Japanese. Contact the facility in advance if you require assistance in another language.
