M-Wave

Nagano Olympic Memorial Arena, or M-Wave, is a covered speed skating oval in the city of Nagano, Japan. M-Wave, which opened in November, 1996, was constructed for the speed skating events at the 1998 Winter Olympics. It was Japan's first International Skating Union standard indoor 400m double-track, and only second indoor track speed skating in Japan. The other, Meiji Hokkaido-Tokachi Oval, is located in Obihiro, Hokkaido.

In addition to the 1998 Winter Olympics, the 2002 World Figure Skating Championships, various ISU world speed skating championships and speed skating world cups, and the 2005 Special Winter Olympics were held. Outside the winter business, other sporting events, large-scale exhibitions and concerts are held.