This tournament is officially recognized by FIS (International Ski Federation), SAJ (Ski Association of Japan), and IVV/JVA (International Citizens’ Sports Federation/Japan Citizens’ Sports Federation) to promote cross-country skiing and improve the health and physical strength of citizens during the winter season. This tournament is the only tournament in Japan that is a member of "World Loppet", which is organized by tournaments in 20 countries around the world.

Sapporo City Council, Health and Physical Fitness Foundation, and Asahi Shimbun sponsored the 50km and 25km marathons and the 11km, 5km, and 3km walking skis for beginners.
With the Sapporo Dome as the main venue, the runners ran in the magnificent heavy snow field passing through the former Nishioka Olympics Memorial Distance Stadium.

A day prior to the tournament on Saturday, February 4, about 150 people including overseas participants took part in a player exchange party, where they formed new friendships and allowed themselves to come into contact with the culture and customs of each country.

See below for the Japanese version.
http://www.sftlegacy.jpnsport.go.jp/wp/jp/2017051801-2/