The Shakotan Peninsula is located in the western part of Hokkaido, about 2 hours by car from Sapporo. The name comes from the Ainu language, which means "summer village". The Shakotan Peninsula has a 30km coastline, and the surrounding area is designated as the [Niseko Shakotan Otaru Coast National Park], which is also the only designated marine park in Hokkaido. There are many fishing villages along the coastline of the Shakotan Peninsula. The earliest was from the Edo period to the end of the Taisho period. Like Rumoi and Hiyama near Hakodate, herring fishing developed. Later, with the depletion of fishery resources, Shakotan also gradually declined. In addition to the beautiful coastal scenery, there are also rich hot spring resources, but due to inconvenient transportation and sparse population, the tourism industry has not developed. It is for this reason that this place can become an excellent scenic spot with beautiful scenery but not crowded with tourists. There are two capes on the peninsula that extend into the sea, namely Shakotan Cape and Kamui Cape. Among them, Cape Kamui is often visited by tourists. Cape Kamui is also an Ainu word, meaning the place where the gods live. There is a 770-meter-long walking trail that stretches out to the sea. Because there are cliffs on both sides of the road, it is forbidden to enter in strong winds. At the end of the road, a huge rock 41 meters high stands far away in the sea - Kamui Rock.
In ancient times, women were prohibited from entering Kamui Cape. There is still a sign at the entrance of Kamui Cape that says "Women are forbidden to enter", but of course it is open now. It is said that when Minamoto no Yoshitsune came to Hokkaido, the daughter of the leader of the Ainu tribe in Hidaka fell in love with Minamoto no Yoshitsune and followed him all the way here. However, when he heard that Minamoto no Yoshitsune had left by boat, he jumped into the sea in despair and turned into Kamui Rock, and there was a curse: any ship carrying women passing by here will sink. Another saying is that there are many reefs in the waters of Kamui Cape, and ships often suffer shipwrecks here, which is called the Devil's Sea. The Shakotan History Book records that when Japanese women pass by here, the sea god will be angry, causing the ship to sink and the fishing industry to slump. Therefore, in 1691, the Matsumae Domain, which was responsible for managing the Hokkaido region during the Edo period, prohibited Yamato women from entering Cape Shakotan. This rule lasted until 1855, at the end of the shogunate, when it was lifted. However, even though the idea of lifting the ban had already been deeply rooted in people's minds, the shogun Tokugawa Iesada later sent his men to bombard Cape Kamui with cannons to break this superstition.