Wikipedia
Warabimochi
is a jelly-like confection made from bracken starch and covered or dipped in kinako ( sweet toasted soybean flour). It differs from true mochi made from glutinous rice. It is popular in the summertime, especially in the Kansai region and Okinawa, and often sold from trucks, similar to an ice cream truck in Western countries.
mochi 1.jpg|Warabimochi as sold in a supermarket