Daytime Visit (Exhibitions)

Solar exhibition

photo of solar exhibition

The solar telescope on the roof of main builiding leads sunlight into the exhibition room. Part of the light is lead to spectroscope and produces "live spectrum" with dark Fraunhofer-absorption lines. The remaining light is projected as a bright image of the sun of approximately 100 cm in diameter. Sunspots are visible if they exist.

Exhibition room

photo of exhibition room

Several objects and large panels, which introduce the world of astronomy and works of observatory are displayed.

Examples: How the telescope works? Why we need large telescopes? How to get spectrum? What the spectrum tells us? What the near-infrared camera shows us? How to measure the distance to stellar objects? How the stars evolve?


photo of 150-cm reflector

150-cm reflector telescope and 65-cm reflector telescope are displayed. These telescopes are used not only for researches but also stargazing. Stargazing parties are held at night on Saturdays, Sundays and Holidays.


photo of monuments

There are replica of Jantar Mantar and an stone circle. Jantar Mantar is an indian observatory built in 18th century.

Mini events

Free of charge. Conducted in Japanese. Duration: 15 ~ 20 min. Schedule may change.

11 amguided tour (monuments)
11:30 amdaytime starwatching
2 pmguided tour (monuments)
3 pm3D theater
11 amguided tour (monuments)
2 pmguided tour (monuments)

Guided tour of 150-cm reflector is cancelled due to spread of Covid-19.


Various events take place. Please check annual events calendar (in Japanese).


photo of mini shop

Open at 10:00 am
Close at 4:30 pm (Mar. ~ Oct.)
Close at 3:30 pm (Nov. ~ Feb.)

Cash only.

Rest area

photo of rest area

You may bring your lunch and have it around there. A vending machine for beverage is available. There is no restaurant.