Morinaga & Co. Ltd.'s Choco Monaka Jumbo ice cream is Japan's top-selling ice cream, with one bar sold every 0.17 seconds or so. With that level of popularity, it is a ubiquitous, yet unique, ice cream thanks to certain secrets that prevent other manufacturers from copying it.

Monaka is a type of wagashi (Japanese traditional dessert) — sweet bean paste encased in a crisp shell made of rice cake.