Northeast of Sapporo and north of Furano, the Kamui Links ski area has 14 courses served by 8 lifts that access a maximum vertical descent of 600m. The Kamui ski area is known to have an annual average powdery snowfall exceeding 8m. There are excellent inbounds glades and accessible side-country. There is some off-piste backcountry with an open boundary policy, but these routes are known for their long return traverses taking up to 20 minutes. Make sure to only exit into the backcountry through gates. On a powder day, start by trying the Panorama course. The Kamui Links is best as a day trip from Furano or Asahikawa, since there are very limited base facilities.
To reach the snowboarding at Kamui Links by plane, fly into Asahikawa airport and take the train to Fukagawa. Alternately, you could fly into Sapporo New Chitose airport (CTS) on the southwest side of Hokkaido just southeast of Sapporo. There are numerous direct inter country flights from Tokyo. From the airport, there are numerous shuttle bus options to the various Hokkaido ski resorts. Alternately, you could take the train from Sapporo into the Osamunai train station. While at the airport, make sure to use the ATM since ATM machines can be quite hard to find at the resorts and credit cards are rarely accepted. While it would be nicer to stay in Furano when coming to Kamui Ski Links, it has irregular bus service.
In addition to flying into Sapporo from Tokyo, there is also a train tunnel connecting Hokkaido Island with the main Honshu Island. The train route from Tokyo northbound passes through Aomori, and the total trip takes between 9 to 11 hours.
Note - keep in mind that the ski areas on Hokkaido are not known to be particularly steep, but they are well known for big snow fall. They are also known for their ones, which are hot thermal spring-fed indoor or outdoor pools (be aware that they are usually naked pools).
When snowboarding and freeriding internationally, it is important to get a travel insurance policy that covers emergency rescue, medical expense and evacuation. There are many destinations that will not initiate rescue or medical treatment without prior payment or proof of insurance. In many cases, the rescue fees, medical fees or evacuation to a reputable hospital can total tens of thousands of dollars. Plans such as GEOS SAR100 or IMG Patriot Travel Medical Insurance are well worth the per-trip cost of $130 to $200 USD.
Overall, Kamui Ski Links is the 3rd most popular snowboard & freeride destination of all 22 snowboarding resorts in Japan.