Oya History Museum

The Oya History Museum (大谷資料館, Ōya Shiryōkan) is a massive former mining site for Oya stone, a distinctive light-grey volcanic tuff created from a mixture of ash and lava. Found only in the vicinity of Oya in Tochigi Prefecture, this stone became internationally famous when American architect Frank Lloyd Wright used it to construct the old Imperial Hotel in Tokyo. Wright favored the material for its fire-resistant properties and its unique, porous texture, which allowed for intricate decorative carving. Today, the museum serves as a testament to the region’s industrial heritage, which dates back to the 17th century.

The entrance building of the Oya Stone Museum — The small museum building located at the entrance to the mine.

Upon entering, a dedicated exhibition room displays the manual tools and early machinery used by miners to extract the heavy stone blocks by hand. From there, visitors descend into the heart of the quarry—a vast, subterranean “cathedral” spanning 20,000 square meters. The caverns reach depths of up to 60 meters, with massive hand-carved pillars supporting the earth above. The dramatic lighting and sheer scale of the hollowed-out stone walls have made the site a premier location for art installations, music videos, and film shoots. Even during the height of summer, temperatures in the caverns remain around 7°C (45°F), so visitors are strongly advised to bring a jacket.

Movie posters inside the Oya mine — The mines are frequently used as a unique backdrop for dramas, movies, and music performances.

Outside the mine, the “Oya Stone Museum Rockside Market” features a stylish cafe and shop where visitors can purchase handcrafted Oya stone products, ranging from absorbent coasters to elegant candle holders. Because the museum offers free parking, many travelers choose to leave their vehicles here and take the short 500-meter walk to Tenkaisan Oya Temple, allowing for a seamless exploration of the area’s geological and spiritual history without multiple parking fees.

Visitor Information
Address	909 Oyamachi, Utsunomiya, Tochigi 321-0345 (Google Maps)
Opening Hours	9:30 AM – 5:00 PM (Last entry 4:30 PM) Closed: Tuesdays (Dec–March); Dec 26 – Jan 1.
Price	Adults: ¥800 / Children (Elementary & Junior High): ¥400
Website	Visit Website

Access
Station / Stop	Line / Bus	Access Details
JR Utsunomiya Station	Kanto Bus (Platform 6)	Take the bus bound for Oya/Tategunari to Oya Shiryokan-iriguchi (30 mins), then walk 5 mins
Tobu Utsunomiya Station	Kanto Bus	Take the bus from the station-front stop to Oya Shiryokan-iriguchi (20 mins)