Kenpi' 'Imo Yokan' 'Anko-dama' Ashinano, Hitoshi. 1998. Yokohama Kaidashi Kikou. Chapter 33. Vol. 5, Page 19, Panel 2. An ' imo senbei ' is a cracker made from sweet potato . There are two kinds of imo senbei: "deep-fried" and "toasted". Deep-Fried Imo Senbei These are deep-fried imo senbei. Sugar-coated deep-fried