At the Anime Expo 2019 event, Level-5 has confirmed that Yo-Kai Watch 4 will be published on the Nintendo Switch of the West. Unfortunately, there are no more clues to this: according to an assistant, you were not allowed to record or take photos of the ad, nor has an approximate release date or any possible novelty been confirmed.
Responding to questions from the fans, those responsible for the game recognize wanting to bring also to Europe and America certain films that seem to be necessary to understand part of the history of the game. There are no promises in this regard, so we can only wait to see how the matter develops.
On the other hand, the announcement of several DLC for Yo-Kai Watch 4: there will be both free and of payment, and will include new creatures, a new location and even a multiplayer mode not yet detailed. It is unknown if they will be included as standard in the western version or not.
Yokai Watch 4 western localization announced at the Level-5 AX 2019 panel. No photos or videos allowed at panel. Coming to Switch; no release date announced.
— HDKirin @ AX 2019 (@HDKirin) July 5, 2019