Wakkanai is a city located in Sōya Subprefecture, Hokkaido, Japan. Wakkanai is the capital of Sōya Subprefecture. Situated approximatel…Wakkanai is a city located in Sōya Subprefecture, Hokkaido, Japan. Wakkanai is the capital of Sōya Subprefecture. Situated approximately 1,100 km north of Tokyo and 270 km north of Sapporo, it is the northernmost municipality under Japanese administration following the loss of Karafuto and the Kuril Islands, with Benten-jima being the northernmost point under Japanese control.