Komadori Ski Center
A small ski resort in the Wakkanai kÅen makes use of the lift here - 3 relatively short runs with just 150 m elevation difference and the longest at 300 m 985 ft.
Try biking north along the coast to see the dozens of small seaweed drying family operations to know where the seaweed in your food comes from. At the northern tip a nice lighthouse and an excellent aquarium await you - with great views of Government radars on green hills - and the islands of Rishiri and Rebun and occasionally Sahkalin are visible. The Moshiripa Youth Hostel rents out bikes at ¥200 per hour or ¥1000 for the day, and also have some slightly more expensive mountain bikes. There are also two golf courses out on the countryside.
Asahi Bowling
A 16 lane bowling alley claiming to be the best in Northern Japan - but then again, they might not have much competition. In any case it's a good option for a cold or rainy day, and watching the normally introverted Japanese hit a strike is fun.
Tokkari Snowmobile Rental
Naturally rents out snowmobiles. Also has a snowmobile course and offers free snowshoe walking.
Onsen
Riyu Harbor Onsen
The most expensive and exclusive of the options, boasts some large open-air baths overlooking the sea.
Suimukan Pool
Not so much an Onsen, more of a traditional indoor swimming pool under an impressive double domed roof. A 25 meter basin, waterslides, jacuzzi and a gym.
Wakkanai Onsen
The town's largest Onsen sits on the west coast and would have had some impressive unobstructed views of Rishiri Mountain, were it not for a huge blunder from the architect, though it is still visible from parts of the bath. A few indoor pools, and some outdoor ones which are unfortunately fenced in by hedges.