Burger King Angry J Whopper‏

As described in the press release, the story behind this special is as follows - there is a well known spicy Jamaican dish called Jerk Chicken. BKJ used this as a basis to develop a summer special. They developed their own version of the sauce, called jerk sauce, and are using it on two sandwiches. The promotion is called Hot Jamaica and the two sandwiches are the Angry J Chicken and the Angry J Whopper. I assume the angry is related to the spiciness and the J stands for jerk and/or Jamaica.

http://www.burgerkingjapan.co.jp/index.html

Photo is a web capture for explanatory purposes, copyright belongs to the company.