The new Doraemon movie uses two virtual worlds for promotion
What would CyberAgent which lost the promotion technique of the conventional Doraemon movie by LINE do? It's a "quest" in the social game.
CyberAgent runs town construction sim "Pigg World" for PCs. They carried out a quest to build the tree house of Doraemon.
I think that this promotion technique is more effective than the sale of items. Because, what we experienced by ourself remains in the memory for a long time. The enforcement period of this quest was two weeks. During this period, fans of Doraemon and heavy user of Pigg World logged in every day(I'm one of those, too), and bought many items to clear a quest.
By the way, I watched a new movie of Doraemon and it was very fun! Unfortunately it is shown only in Japan...