Toyotomi Onsen Fureai Center
The town-run bathhouse at the heart of Toyotomi Onsen, Japan's northernmost hot-spring village, an hour by car from Wakkanai airport. The spring was struck during oil exploration in 1926 and still carries traces of petroleum — a rarity worldwide, with an oily smell and slippery feel. It is famed as a 'miracle bath' that draws people from across Japan seeking relief from atopic dermatitis and psoriasis. Besides the general bath there is a cooler cure bath for long soaks. Admission is a cheap ¥510; open 10:00–21:00 (last entry 20:30), closed every other Thursday. The canteen serves jingisukan lamb and set meals. Fit it into a far-north drive with the Sarobetsu wetlands and views of Mt Rishiri. About 10 minutes by bus from JR Toyotomi Station.