Hiyama Subprefecture is a subprefecture of Hokkaido Prefecture, Japan located on the Oshima Peninsula on the Sea of Japan side. It includes Okushiri Island. It was established in 1897.
Esashi, Hokkaido (Hiyama)
…Esashi (江差町, Esashi-chō) is a town in Hiyama Subprefecture, Hokkaido, Japan. It is the capital of Hiyama Subprefecture. One of the oldest towns in Hokkaido, the name Esashi comes from the Ainu word for kombu…