The Yonex logo has always intrigued me in the simplicity of its design. The logo effectively uses the triangle and the circle shapes to create a YY for Yonex (or perhaps Yoneyama). The triangle with the circle at the bottom could also be thought of as the shuttle used in the game of badminton, but maybe that's my imagination. The standard logo is set on a blue and green background with white text but I have also seen a black and white logo as well. The YY logo is also very distinct on the badminton & tennis racquets as well. - See more at: http://www.dinesh.com/history_of_logos/sports_logos/yonex_logo_design.html#sthash.YgYRGH2C.dpuf