The reasons for the delay are unknown. However, the fact that only off-screen gameplay footage from this year’s TGS was previously revealed and there was no official gameplay trailer released online made it likely that a delay would be announced.

All versions of the previous three mainline Yo-Kai Watch titles launched on Nintendo 3DS in Japan, while North America and Europe have now received both Yo-Kai Watch and all three versions of Yo-Kai Watch 2, with Yo-Kai Watch 3 planning to launch on February 8, 2019, in North America and winter in Europe.

It is currently unknown which versions of Yo-Kai Watch 3 will be released outside of Japan. 

Yo-Kai Watch 4 will contain major gameplay changes, including human characters fighting alongside their Yo-Kai friends.

An action RPG spin-off series, Yo-Kai Watch Blasters, launched on September 7, 2018, in North America and Europe with Red Cat Corps and White Dog Squad versions, while the Yo-Kai Watch Blasters: Moon Rabbit Crew update launched on September 27, 2018.

Yo-Kai Watch 4 will launch for Nintendo Switch in spring 2019 in Japan.