The following table shows the attendance figure of 2020 NPB Japan series. The series was played by the Pacific League champion Fukuoka Softbank Hawks and the Central League champion Yomiuri Giants. Hawks swept Giants to win in four straight games.
The franchise of Giants is actually Tokyo. Due to the corona situation, the schedule of the series was unusual and Tokyo Dome had been booked by another baseball event. Giants could not use their home stadium this year.
The source is Nippon Professional Baseball Organization.