Fukasawa was educated at and played for Shizuoka Gakuen High School, where he led the varsity soccer team to the national championship in 1995. After graduating from high school, he entered professional football. Fukasawa played 20 games in J1 League, Yokohama F. Marinos and 134 games in J2 LeagueAlbirex Niigata. In 1996, he played with River Plate in Argentina for a year on loan. In 1999, he went on loan again to play with CD Tenerife in Spain for 6 months. In 2005, he moved to Canada to play for Montreal Impact in the United Soccer League and was named the club's newcomer of the year in his first season. In 2007, he joined Bangkok University FC in Thailand and became the first Japanese footballer to play for a non-Japanese club in AFC Champions League. In 2008, he moved to Singapore's S.League side Singapore Armed Forces FC. Presently he decided to come back to Thailand again and join with his former club Bangkok United FC " Masahiro Fukasawa won the accolade as SAFFC’s Player of the Year at the Warriors Nite 2008, the Club’s annual Appreciation Dinner, held on 19 Nov 08 at the Civil Club @ Bukit Batok. The Award marked a personal milestone for the Japanese who joined the Warriors only this year and capped it with a consistent and solid performance on the flanks and in central midfield. The versatile Japanese has been highly influential and effective, particularly in the final rundown to the Championship against title contenders, Home United and Super Reds. In early of 2012 he joined Bontang FC. In 2013 he joined Nagaworld FC in the Cambodian League, where he served as captain. He stayed with the club for 3 years until moving to Angkor Tiger FC at the end of the 2016 season, where he was also given the captain's armband, succeeding fellow Japanese midfielder Masakazu Kihara. He is one of the few Japanese players to play in 4 out of 6 Confederations.
Playing style
Small in size but speedy on and off the ball, originally debuted as a skillful shadow striker in J.League. He was converted into an attacking midfield while at Montreal and had sharp one-on-ones. In Singapore, with his ball skills, he was brought into the middle of the field as a holding midfield, and that is where he plays now in Cambodia.