Pepsi has launched a &amp;#8220;fat-blocking&amp;#8221; soda in Japan.&nbsp; The new product, Pepsi Special, has been approved as a health conscious food item from the government and will hit stores in early 2013. Pepsi has toyed with various flavor innovations previously in Japan, like fruit versions of its classic soda, but this marks the first time the soda maker has gone the health route.&nbsp; 