Mochi is a type of Japanese rice cake which can be made by pounding on the rice so long that it becomes like a gum. Water and other additives are sometimes added to the pounding process. Mochi is a popular confectionery during the New Year timing. Various type of mochi exist, but one of the most common ones is Daifuku where the mochi gum is formed into a round shape and given a filling.
And the amount of fillings are a lot! The standard filling is anko, which is a sweet bean paste similar as used in other confectioneries such as Taiyaki or dorayaki. A popular alternative mochi is filling the Daifuku with yogurt, cream and a strawberry. Other fillings like custard, different types of cream or other fruits. The mochi itself also come in many different colors.