There is a little wagashiya (Japanese confection shop) near us called Korakudo. They make all kinds of mochi (rice cakes). One of my favorites from this shop is the "nama choco (ganache) daifuku (rice cake)". It is a very soft mochi (rice cake) filled with chocolate ganache and covered with cocoa powder. This shop only makes this daifuku during the autumn and winter season (since it is cooler).
Since Satoshi hasn't tried this yet, I decided to get some.