Japan, as well as many countries in Central America, are known for their incredible baseball players, so there is now a World Baseball Classic. The international tournament began in 2006, and is more similar to the format of soccer’s FIFA World Cup, by including national teams instead of regular-season teams. Over its five iterations, the Classic has been won by Japan twice, followed by the Dominican Republic and the United States.

Source: https://www.distractify.com/p/why-is-it-called-the-world-series