Beaten by a thread with a more accurate title (although it's free in more countries than just Japan and HK, it's also free in most Asian countries)
Monster Hunter: World free for PS+ users in Japan and Hong Kong (price error?)
Edit: Looks like Indonesia also has it for free.www.resetera.com
It's still very early in Europe (5:48 am right now), maybe an announcement later today?Also free for HK store.
I think it will apply to EU and US store.
It will come to EU and US PSN too. It's an added ps plus game of this month.
I think the middle east falls under EU store rules