Level-5 has announced a Japanese release date for Yo-kai Watch 4. The June date comes alongside a new trailer and a relaunch for the game's official website.
Level-5 Provides Additional Yo-kai Watch 4 Details - RPGamer
Yo-kai Watch 4, Yo-kai Watch Wiki
Yo-kai Watch Academy Y Gets New Trailer - RPGamer
Yo-kai Watch Archives - RPGamer
Yo-kai Watch 4 - Wikipedia
Level-5 Provides Additional Yo-kai Watch 4 Details - RPGamer
Yo-kai Watch 4, Yo-kai Watch Wiki
Yo-Kai Watch 4 Release Delayed Yet Again In Japan
Yo-kai Watch Archives - RPGamer