Noboru Sugai (須貝 昇, born 16 October 1949) is a Japanese professional golfer.
Sugai was born in Tokyo, to Japanese father and a Russian mother. He turned professional in 1975 and has won three tournaments and over 275 million ¥ on the Japan Golf Tour.
In 2002, he became the first Japanese to win the Senior British Open in what was the last staging before the tournament became a Champions Tour major. He played on the European Seniors Tour in 2003 and 2004 with little success.