Do you know Doraemon, the Gadget Cat Robot from the Future? Doraemon is a character from Japanese classic comic series. He loves Dorayaki. Dorayaki is a simple sweet. Two small pancake-like sponge wrapped a filling of sweet Azuki red bean paste. It is easy to make at home.
Tsubu-an (Sweet Red Bean Paste) can be made at home, or you can buy ready to go.