Surprisingly kids and their parents occupied most of seats. Besides, they knew the names of characters properly. To be frank, I was surprised at this. Unfortunately Angry Birds is not very well known and not the popularity in Japan. The ranking order are low, and there are few kinds of goods sold in stores. However, children knew Angry Birds. Where would they know Angry Birds? It is necessary to research in this more.
I think that this event was timely. Because of a period of the cross-promotion with Puzzle and Dragons, furthermore, it was just after the illustration contest with them. This would become the good memory for kids above all.
By the way, Soon after cross promotion with Puzzle and Dragons started, the ranking in Japan of Angry Birds Free rose from lower than 400th place to the 20th place. This is Puzzle and Dragons effect.