Ken Maezawa is a veteran figure in Japanese professional sports, with an extensive career spanning sports management, marketing, and entertainment. He has held senior roles at Pasona, Jack Sakazaki Marketing, the Hokkaido Nippon-Ham Fighters, Pacific League Marketing, and the Yokohama DeNA BayStars. After rejoining the Hokkaido Nippon-Ham Fighters in 2015, Ken led the club’s strategic “Ball Park Project” as an executive, helping drive the organisation’s broader sports and entertainment strategy. In March 2026, he became President of Fighters Sports & Entertainment (FSE), where he continues to lead the organisation’s growth and development.