Ajinomoto Stadium, formerly known as Tokyo Stadium in the AFC Champions League and rugby competitions, is a multi-purpose stadium in Chōfu, Tokyo, Japan. The stadium was founded at Kantō Mura, the redevelopment area formerly used by United States Forces Japan, in March 2001. It was the first stadium in Japan that sold its naming rights, which went to Ajinomoto Co., Inc. on a five-year, 1.2 billion yen (about 10 million U.S. Wikipedia