This is a YONEX game shirt. I bought it a few years ago, but I only wore it twice for practice. I think it was around 12,000 yen at the time. As shown in the third image, the collar is detachable. It's a YONEX wear, size L. - Brand: YONEX - Color: White/Green/Orange - Design: Gradient pattern - Accessories: Collar band Thank you for looking.