Yutou Island is an island located on the far east portion of the borderline that divides the Gourmet World from the rest of the Earth and is located just west of Area 8, one of the continents of Gourmet World. It is the location of the Harbour of Evil Spirits which leads into Gourmet World, and it is said to be the third and the most dangerous route into the Gourmet World.
The island is a maze which is tough to travel through even when the Mist clears up. It is easier to travel through the Island by following someone who knows the route which leads to the Golden Swamp.
Despite being called an island, it is actually a small continent, but is likely referred to as such due to it being like an island when compared to the humongous continents of Gourmet World.