Originally Posted by BuildingMyBento

Two points about that Onigilly place:

Three for US$8.28? Pretty good profit margins, I reckon.

Also, the article mentions that onigiri are a popular street-food in Japan. Generally, you don't eat while you walk over there, and although there are plenty of festivals scattered around - in parks, at temples - that's where the eating would occur. Moreover, there aren't any street vendors in Japan in the strict sense of the term, but you can find random trucks selling sweet potatoes and fish, at least in Tokyo.