Masahiro was born in the city of Hiroshima on September 9, 1955. He is known among his foreign friends as Massy.

His father was a golfer and he took Massy to a driving range when he was 10 years old. At 14 he became the youngest Club Champion at his home course. Played in Club Championship next 3 years and won at ages 16 and 17.

Kuramoto proceeded to win three times the Japan Amateur Golf Championship (1975, 77, 80) and the Japan Collegiate Golf Championship during all four years of college (1974-77).?He won his first professional event, Chushikoku Open, as an amateur in 1980 and then turned professional in 1981. In 1982 Kuramoto was to live one of the highlights of his golf career when he finished tied 4th place at the British Open at Royal Troon, only two strokes behind the winner Tom Watson. He traveled the world in the 1980’s and 1990’s playing against the best players of the time including playing full-time in the US PGA Tour. In 2003, at 48 years of age he returns to his winning ways shooting an opening round of 59 at the Acom International and went on to win the tournament.

Kuramoto has won 30 Japan Tour titles during his outstanding career, is one of only six Life Time Japan Tour Exempt Players, has earned close to USD 10 million in Japan Tour career prize money and plans to play fulltime in the US Seniors Tour in 2006.