Nagoya Civic General Gymnasium, formerly Nagoya Rainbow Hall, is an indoor sports arena located in Nagoya, Japan. From April 1, 2007, its name was changed to Nippon Gaishi Hall, to reflect the sponsorship of the NGK Insulators. The capacity of the arena is 10,000 people. The hall hosted some of the group games for the 2006 Volleyball World Championship. It hosted Dream 16, the mixed martial arts promotion in Japan on September 25, 2010.