Yokohama Stadium has become a top candidate to host baseball in the 2020 Tokyo Olympics, an official source said Monday.

Baseball and softball, which have not been played at the Olympics since 2008, are among the sports that local organizers have nominated for the Tokyo Games in addition to the core Olympic program.

The other sports are surfing, skate boarding, sport climbing and karate. The IOC will announce 2020's additional sports this August before the Rio de Janiero Games.

Tokyo Games organizers also looked into Tokyo Dome and Chiba's QVC Marine Field as potential venues.