Hokkaido was in its post Jomon period at the time of this fresco architecture of the fourth to fifth century related to north-east Asia (Russia, China, the Korean Peninsula and Japan) surrounding the Sea of Japan.
Because it is engraved in the fragile rock called the Otaru soft stone, a preservation building along the rock was constructed.
You can actually view it through a capsule.
|1 Chome-3-4 Temiya, Otaru-shi|
“Near the main building of Otaru Museum.
Get off the bus at Otaru Museum from Otaru Station.”