Shinsuke Kashiwagi (柏木 真介、born December 22, 1981) is a Japanese professional basketball player.

Kashiwagi was a member of the Japan national basketball team.

He played for the team in the 2006 FIBA World Championship and the FIBA Asia Championship 2007 and FIBA Asia Championship 2009.

[1] In the 2009-10 season, Kashiwagi entered the month-long winter break averaging 13.7 points and 3.5 assists per game for the Seahorses.

[2] He was named to the West squad for the 2009-10 JBL Super League All-Star game.