The Tokyo Big6 Baseball League is an intercollegiate baseball conference that features six prominent universities in the Tokyo area. It is the oldest collegiate baseball conference in Japan. Before the 1936 establishment of the Japanese Baseball League and subsequent growth of Nippon Professional Baseball, the Big6 League was widely considered the highest level of baseball in Japan.

The Meiji Jingu Stadium is a baseball stadium in Shinjuku, Tokyo, Japan. It opened in 1926 and holds 37,933 spectators. Property of the Meiji Shrine, it is the home field of the Tokyo Yakult Swallows professional baseball team. It also hosts college baseball, including the Tokyo Big6 Baseball League and the Tohto University Baseball League.