Ginganomori Observatory (Rikubetsu Town) - Japan's Largest Public Telescope in the City of Starry Skies
Overview
Ginganomori Observatory (Rikubetsu Space and Earth Science Museum) is a public observatory in Rikubetsu Town, Ashoro District, Hokkaido. In 1987, the Ministry of Environment designated Rikubetsu Town as a "City of Starry Skies," and it was further recognized in 1997 as one of "10 Towns Friendly to Starry Skies," making it one of Japan's premier stargazing destinations.
The observatory features one of Japan's largest public-access reflector telescopes with a diameter of 115 centimeters. Through this telescope, you can observe nebulae and galaxies that are invisible to the naked eye in remarkable detail.
Observation Environment
Rikubetsu Town is located in the inland region of Hokkaido with no major cities nearby, resulting in extremely minimal light pollution. During winter, the region is covered by continental high-pressure systems, resulting in high clear-sky rates, and dropping temperatures increase atmospheric transparency.
Although the elevation is only about 340 meters, the flat surrounding terrain ensures an open view all the way to the horizon. On favorable nights, the Milky Way appears vividly, and low-latitude auroras may even be observed.
Facilities and Equipment
In addition to the main 115-centimeter reflector telescope, there are two 30-centimeter reflectors, one 25-centimeter reflector, and a four-unit solar telescope. During the day, you can observe sunspots and prominences on the sun, while at night you can enjoy seasonal celestial objects with expert staff explanations.
The facility includes a planetarium and exhibits related to space and earth sciences, providing enjoyable experiences even on days with unfavorable weather.
Access and Usage Information
About 2 hours by car from central Obihiro, and about 2.5 hours from Tokachi-Obihiro Airport. Public transportation access is limited, so rental car use is recommended. Winter requires caution about icy road conditions.
The facility is open Wednesday through Sunday and holidays (closed Mondays and Tuesdays), with summer hours from 14:00 to 22:30 and winter hours from 13:00 to 21:30. Observatory sessions require no advance reservation, though group visits should notify the facility in advance. Parking is free.
Observation Tips
Rikubetsu Town is one of Japan's coldest regions, with winter temperatures sometimes dropping below -20°C. Prepare thoroughly for the cold. Hand warmers, heavy clothing, gloves, and a hat are essential. Telescope eyepiece lenses may become foggy, so bringing lens wipes is convenient.
Summer conditions are relatively mild and ideal for Milky Way observation. However, don't forget insect repellent. Spring and autumn offer excellent conditions for observing galaxies and star clusters.