This is an open-air Oya stone quarry that is still in operation today. The large area, which has been quarred since 1854, still retains traces of quarrying by hand. The quarry is open for tours on Saturdays, Sundays, and holidays. It has become a popular spot for pizza making (in Oya stone ovens), craft making, Oya stone outlet shops, and treasure hunts.
209 Oyamachi,Utsunomiya City ℡028-678-8802
Quarry exploration （entrance fee）: 700 yen （40 minutes）
(Boots and helmets available for rent), Stone oven pizza baking（stone oven pizza baking, bagging of Oya stone scraps, Oya stone manufacturing, treasure hunting, etc. are available for an additional fee.
Closed: Mon-Fri （Open on national holidays）
