Keisuke Tsuboi is a Japanese former professional footballer who played as a defender.

The Urawa Red Diamonds , colloquially Urawa Reds, also known as Mitsubishi Urawa Football Club from April 1992 to January 1996, are a professional football club in the city of Saitama, part of the Greater Tokyo Area in Japan. The club plays in the J1 League, the top tier of football in the country. Its name comes from the former city of Urawa, now part of Saitama.