Nippon Professional Baseball

Nippon Professional Baseball (日本野球機構, Nippon Yakyū Kikō; NPB) is a professional baseball league and the highest level of baseball in Japan. Locally, it is often called Puro Yakyū (プロ野球), meaning simply Professional Baseball; outside of Japan, NPB is often referred to as "Japanese baseball".

Source: Wikipedia — Nippon Professional Baseball (CC BY-SA 4.0)