Wakkanai is a city located in Sōya Subprefecture, Hokkaido, Japan. It is the capital of Sōya Subprefecture. It contains Japan's northernmost p…Wakkanai is a city located in Sōya Subprefecture, Hokkaido, Japan. It is the capital of Sōya Subprefecture. It contains Japan's northernmost point, Cape Sōya, from which the Russian island of Sakhalin can be seen.