NPB and NPB Baseball Differences

I did some research and found out that there are some differences between the balls used in Japan and balls used in MLB. The differences are small. But there are some differences. According to Japan Wikipedia, Rawlings has a monopoly on the balls used in games in MLB. These balls are made in Costa Rica. The balls used in MLB has a different texture compared with the balls used in Japan. The MLB balls are more slippery. The stitches in MLB balls are higher. They stand more out from the ball itself meaning there is more air resistance when you hit the ball hence it does not carry as far as the Japanese balls which have a slightly different texture, not as slippery and the stitches are lower meaning there is less air resistance.

Balls have to weigh between 141.7-148.8g and have a radius between 22.9-23.5cm.

In Japan balls tend to be on the lower side of the requirements whereas in MLB the balls tend to be on the higher side of the regulations, making the MLB balls slightly heavier and bigger than the Japanese balls.

Balls used in Japan also have different "hanpatsuryoku" which in English translates to something like "pop." There is more pop in the balls. In 2004, Dragons manager Ochiai demanded balls which did not carry as far as others used because Ochiai's Dragons was a defensive team, so the Dragons started using different types of balls in their home games. Balls with less pop.