It is the first time that I've learned that Oden originated from Japan. In China we call it as 关东煮, but I've never thought of its origin before. You can even see it sold all year around in the street stalls or supermarkets. I guess Oden is popular in Taiwan, too.
It is rather interesting for me to know that most westerners(non-Japanese) mistake its emoji for a rocket... It is really a kind of reverse culture shock!