We visited Anpanman museum in Yokohama, it was a very rainy day and Yokohama is not so close to Tokyo as you will expect. But we had a great time!!!
Now some wikipedia about him that can be found here
Anpanman (アンパンマン?) is a Japanese picture book series written by Takashi Yanase since 1973. It was inspired by Yanase’s struggles to survive as a soldier in World War II. Many times, he became faced with the prospect of starvation, which made him dream about eating anpan (a bean-jam filled pastry).