The latest edition of Japanese publication CoroCoro has revealed that Yo-kai Watch: Three Kingdoms will be heading to the Nintendo 3DS in Japan on April 2nd. The game is a joint collaboration with Koei Tecmo. Japanese gamers that purchase the game will receive special Commander Legendary Medal for Komasan. The first print run of the game contains a special Komasan’s figure strap. If you opt for the digital version then you can get a Buchinyan that joins you as a partner.
Japan: Yo-kai Watch Three Kingdoms Coming April 2nd

How many of these are there, geez.
About as much as the number of Dragon Quest titles that are unreleased outside Japan
Umm, 3? Perhaps? Then there’s a couple of spin offs.
While Koei Tecmo & GameFreak teamed up to give us Samurai Warriors X Pokemon with Pokemon Conquest, Level-5 is teaming up with them to give us Dynasty Warriors X Yo-Kai Watch with Yo-kai Watch: Three Kingdoms.