The shrine houses 188 deities, an unusually high number for a single religious site in Japan.
It features the 'Sanbongi-sugi', a cedar tree with three trunks emerging from a single root system, estimated to be over 600 years old.
The mountain was historically a center for mountain asceticism known as Shugendo.
In 2018, the site gained national attention following claims from space enthusiasts and digital creators regarding unusual light phenomena appearing in photographs.
The shrine contains stone inscriptions dating back to the Edo period that document its long history of religious pilgrimage.
Mt. Oiwa, home to the historic Oiwa Shrine, is a site of deep spiritual significance located in the mountains of Hitachi, Ibaraki. The shrine is renowned for its collection of 188 enshrined deities, a rarity in Japanese Shinto practice where most shrines house only a few. A primary feature of the site is the 'Sanjin-ishi', a massive, naturally formed rock formation believed to hold immense spiritual energy. The grounds feature a centuries-old cedar tree known as the 'Sanbongi-sugi', which is designated as a protected natural monument. Visitors navigate a forested trail that connects the shrine to the mountain summit, offering views of the surrounding Ibaraki landscape. The site is historically associated with both Shintoism and Buddhism, reflecting the tradition of Shinbutsu-shugo. Excavations have uncovered ritualistic items, suggesting the mountain has been a site of worship since the Jomon period.
The path leading to the Sanjin-ishi rock formation during the soft morning light.
Wear sturdy hiking boots as the path to the summit is uneven and can be slippery.
Bring insect repellent during the summer months due to the dense forest environment.
Check the official website for ritual schedules before visiting to ensure access to all areas.
Do not wander off the marked hiking trails, as the terrain is steep and features dense undergrowth.
Maintain silence near the prayer hall; remove hats and refrain from eating or drinking while walking the shrine paths.
