Masakazu Fujiwara, in Japanese 藤原正和, is Japanese long-distance runner, who specializes in the marathon. He has a personal best of 2:08:12 hours for the event. He was the 2013 Japanese champion in the marathon and won the 2010 Tokyo Marathon. He trains at Honda Sports team.

The Tokyo Marathon is an annual marathon sporting event in Tokyo, Japan. It is a World Athletics Platinum Label marathon and one of the six World Marathon Majors. The latest edition of the race took place on 3 March 2024. It is sponsored by Tokyo Metro.