Japan stepped up their preparations for this summer's World Cup by defeating Cyprus 1-0 in a friendly at the Saitama Stadium this afternoon.
However, Konstantinou could not prevent Japan from breaking the deadlock two minutes before the break. Manchester United playmaker Kagawa saw his shot blocked, but the ball fell for Atsuto Uchida, who scored from close range.
Alberto Zaccheroni's men continued to control proceedings after the restart, although they were unable to breach the Cypriot net for a second time as the contest ended 1-0 to the home side.
They will now take on Costa Rica and Zambia in further warm-up encounters, before facing Ivory Coast, Greece and Colombia in the group stages in Brazil.