Hiromasa Fujimori is a former Japanese Olympic swimmer, son of renowned coach Yoshihiro Fujimori. Along with his younger brother, Takeharu, he began swimming at an early age under the guidance of his father, who also coached Olympic medalists at the 2000 Sydney Games.

Fujimori graduated from the Japan University of Sports Science and earned a master’s degree in Sports Science from the same institution. Throughout his athletic career, he was noted for his significant achievements, including victories at the 2013 and 2018 National Swimming Championships, as well as the 2013 East Asian Games. He won a silver medal at the 2014 Asian Games and several gold medals at the World Championships in Paris (2015), Russia (2016) and Tokyo (2016), as well as a bronze medal at the 2018 World Short Course Swimming Championships.

At the 2016 Olympic trials, Fujimori placed second in the 200 m individual medley, securing his participation in the Rio de Janeiro Olympics, where he finished fourth, 0.16 seconds shy of winning the bronze medal. In March 2024, he decided to retire from competition, leaving a legacy of consistent results both globally and domestically throughout his outstanding career.