Polar bear kyaraben

This is not a specific character. Kawaii white bear kyaraben.
Face of bear is Sushi rice. A meatball and a carrot decoration are also bear face.

Kyaraben (character bento) workshop

Kyaraben, a shortened form of character bento, is a very popular bento style in Japan which features food decorated to look like Anime or Kawaii characters. At the workshop you learn how to make authentic Kyaraben and the result you can take home. More info http://tokyodoll.web.fc2.com/workshop/bentoworkshop.html