Kagami-mocchi, rice cake with some decorations
This is called Kagami-mochi in Japanese and one of New Year's decorations. It is decorated at Tokonoma, the main alcove of houses, to welcome gods and keep the evil spirits away from them. The mochi is put to hope the long life because the food is very stretchable when being eaten. The nature of stretch means long life. But the irony is that some senior adults unfortunately happen to choke on to passing away every year after eating the food to hope the long life.