The NHK Spring Mitsuzawa Football Stadium (ニッパツ三ツ沢球技場) is an association football stadium in Kanagawa-ku, Yokohama, Japan. It serves as a home ground of Yokohama FC and, on occasion, Yokohama F. Marinos. Until 1999 it had been the home of Yokohama FC's spiritual predecessor, Yokohama Flügels, and also, on occasion, of Kawasaki-based NKK FC. The stadium holds 15,454 people. It was formerly known as Yokohama Mitsuzawa Football Stadium. Since March 2008 it has been called NHK Spring Mitsuzawa Football Stadium for the naming rights by NHK Spring Company. It is also used sometimes for Top League rugby games. During the 1964 Summer Olympics in Tokyo, it hosted some of the football preliminaries. It was also one of the venues of the 1979 FIFA World Youth Championship.