If you've been to Japan, you've seen this sign literally everywhere. It's the sign for exit, with the characters 出口 Deguchi, or exit in Japanese underneath the symbol.
Available in unisex adult sizes S-3XL, printed on Gildan G500 heavy cotton 5.3 ounce t-shirt (100% preshrunk soft cotton). Choose either black shirt with green print or white shirt with green print.