The Saitama Seibu Lions are a professional baseball team based in Tokorozawa, Saitama, Japan. They compete in the Pacific League of Nippon Professional Baseball (NPB). Founded in 1950, the team has a rich history and has won multiple championships, making them one of the most successful teams in Japanese baseball. The Lions play their home games at MetLife Dome, which has a seating capacity of over 30,000 fans. The team's colors are navy blue, white, and gold, and they are known for their strong fan base and competitive spirit. The Lions have produced many talented players who have made significant contributions to Japanese baseball.