For cut guys from Asia, I would look toward Indonesia and Malaysia, due to the influence of Islam.
As well, you'll find a good number of circumcised men in the Philippines and South Korea, two countries where the historical American presence (from the military to missionaries) increased its prevalence.
I rather like guys who are uncut, so take me to Japan or India!
Semi-related question: Why do so many Japanese films have guys (usually the tops) wearing sunglasses or weird goggles? It's rather distracting from what might otherwise be a nice scene.
Probably to hide their identity
Please understand: in some of these SE Asian countries porn is illegal - and gay porn ESPECIALLY so - so,yes.... in most cases it is to protect their identity...
Mind you, in some instances it's a fetish thing too... but usually, IMHO, it's to protect the actors from legal problems in their countries....
I understand it's such a shame considering it takes away from seeing such gorgeous guys in their full glory but it is what it is! 😞