Shinji Hazawa (羽澤 慎治, Hazawa Shinji, born 12 April 1999) is a Japanese tennis player.
Hazawa has a career high ATP singles ranking of 501 achieved on 27 February 2023. He also has a career high doubles ranking of 249 achieved on 17 April 2023.
Hazawa has won 1 ATP Challenger doubles title at the 2022 Kobe Challenger with Yuta Shimizu.