Oshoro Stone Circle

The Oshoro Stone Circle is an ancient archaeological site located in Otaru City, Hokkaido, Japan. Dating back approximately 3,000 to 4,000 years to the Jomon period, this ritual site consists of a circular arrangement of stone pillars that served ceremonial purposes for prehistoric inhabitants of the region. The circle measures roughly 18 meters in diameter and originally contained more stones than are visible today, making it one of northern Japan's most significant prehistoric monuments.

This site holds considerable cultural importance as evidence of the sophisticated spiritual practices of Jomon people, who inhabited Japan long before the arrival of rice agriculture and samurai culture. The stone circle is believed to have functioned as a calendar or observatory aligned with celestial events, though its exact purpose remains a subject of archaeological study. The surrounding area has yielded numerous artifacts including pottery and tools that provide insight into the daily and spiritual lives of these ancient communities.

Visitors can walk around the preserved stone circle and observe the arrangement of the remaining pillars, which stand in their original positions. Information boards in Japanese and English explain the site's historical context and archaeological significance. The experience is contemplative rather than interactive, offering a rare opportunity to connect with Japan's prehistoric past in a natural hillside setting overlooking the Sea of Japan.

The Oshoro Stone Circle is located approximately 20 kilometers west of central Otaru. Access by car is most convenient, with a small parking area available at the site. Public transportation options are limited, though visitors can take a bus from Otaru Station toward Oshoro and walk approximately 15 minutes from the nearest stop. Admission is free year-round, though the site may be difficult to access during heavy snowfall in winter months.