Ginganomori Observatory (Rikubetsu) — Japan's Largest Public Telescope for Stargazing in the 'Town of Stars'

Overview

Ginganomori Observatory (Rikubetsu Space and Earth Science Museum) is a public observatory in Rikubetsu, Ashoro County, Hokkaido. Rikubetsu was designated a "Town of Stars" by the former Environment Agency in 1987 and recognized among the "Top 10 Star-Friendly Towns" in 1997, boasting Japan's finest stargazing environment.

The observatory features a 115cm reflecting telescope—one of Japan's largest public instruments—allowing visitors to observe distant nebulae and galaxies invisible to the naked eye.

Observation Environment

Rikubetsu is located in inland Hokkaido, surrounded by few major cities. Light pollution is minimal. In winter, continental high-pressure systems bring clear skies and high transparency. Though the elevation is only about 340 meters, the flat terrain with an open horizon ensures excellent sightlines. The Milky Way is vivid under good conditions, and faint auroras are occasionally observed.

Facilities and Equipment

Besides the 115cm reflecting telescope, the facility includes two 30cm and one 25cm reflecting telescopes, plus a four-unit solar telescope. Daytime solar observation is available, while staff provide nighttime explanations of seasonal celestial objects. The museum features planetarium shows and exhibits ranging from basic astronomy to cutting-edge space research.

Access and Information

About 2 hours from Obihiro; about 2.5 hours from Tokachi-Obihiro Airport. Public transportation is limited; a rental car is recommended. Winter road surfaces freeze; caution is needed.

Open Wednesday–Sunday and holidays (closed Monday–Tuesday). Summer hours: 14:00–22:30; winter hours: 13:00–21:30. Stargazing events require no reservation, though group notification is appreciated. Parking is free.

Stargazing Tips

Rikubetsu is one of Japan's coldest regions, sometimes dropping below -20°C in winter. Prepare thoroughly: hand and foot warmers, heavy clothing, gloves, and hats are essential. Telescope eyepieces can fog—bring lens-cleaning supplies.

Summer is relatively comfortable; the Milky Way is ideal for observation. Bring insect repellent. Spring and autumn offer excellent conditions for nebula and star cluster observation.