When I went to Europe, 2 years ago, all my stuff worked fine (laptop, camera, cellphone, etc) and I used a cheapo adapter plug I got at the air port for $10 bucks or so. Looked like like this https://www.amazon.com/Ckitze-Europe-Travel-Power-Adapter/dp/B001EB26MO
you plug one end to your US stuff, the other end to the wall. Not sure if the ps5 works like that, but I don't see why not...
> Just buy a cheap USB charger for $1 when you land so you have a local plug.
If he has a US charger that will work in Japan and South East Asia. Add a tiny euro converter to it (which you can get locally for like 50c) and it will work in India and Europe as well. It will also work in the UK/Ireland/Malaysia/Singapore, incidentally, you just need to press in the earth pin in the socket to get it in. This is what I travel with mostly, American plugs and that little adapter.
I'm slightly wary of the really cheap Chinese USB chargers, in my experience branded chargers tend to work better and may be less of a safety risk. I usually only use the one really cheap one I have to charge other cheap stuff that only requires a low current.
But for Japan/SE Asia US plugs work the best anyway.
I've done a couple trips, my longest so far has been four months, but here's a few notes:
Good luck! It's always exciting to see someone else taking the leap.
Just google, they are easy to find.
How's this:
https://www.rei.com/product/775157/rei-co-op-adapter-plug-e106-europe-and-asia
Or this, it has Amazon prime:
https://www.amazon.com/Ckitze-Europe-Travel-Power-Adapter/dp/B001EB26MO
Most modern power adapters can run on 110-240VAC. You may need a plug adapter for the countries you're traveling through, but otherwise, the adapter should work. This Adafruit adapter is a good example. You just need a basic adapter since the adapter itself can handle the power. Avoid the fancy, over-priced "international power adapters" that are usually inadequate power.
I travel more than most people and I carry the things listed below. You can find them around a $1. Get a handful of them. I have the UK end, the EU end and so on. From my toothbrush to my cell phone to my laptop, almost all modern devices are 110-240 50/60hz meaning you only need the end.
If the device power says 110-240 like almost all modern electronics and even my TV all you need is the following.
For Europe. You will find a lot of Euro adapters mixed with Indo-African for whatever reason they are not uniform there.
For Africa/India etc...
Unless absolutely necessary do not buy a power converter, they are generally cheap and have fans inside. When that thing goes, the brick gets hot enough to melt. I have had this happen with two different ones. One from Brookstone, one from random Amazon.