It is easier to go to a baseball game in Japan than it is to play a game of baseball. Baseball is so popular, you have to book a field two months in advance if you want to play a pick-up game. 20Professional baseball is also popular. The Japanese teams attract over 15 million spectators a year. Each team is allowed one import player from the United States. Hank Aaron might have beaten Babe Ruth's record, but the world record for home runs is held by a Japanese player called Sadahara Oh. He hit 868 in his career.