I would say West is Europe, Japan and a few others. But I think I need a new word for that one.
Ehh, I live in Europe. Moving forward I don't think it makes sense to bundle it with the US, who is like the biggest threat to the EU, considering the past few years.
The West is UK, Western Europe, Australia, Canada, US, Scandinavia. I agree that Japan is a really interesting one that shares a lot with the West, but doesn't have the same cultural roots. I wouldn't be opposed if they wanted to be counted as part of the West, but I don't know if they would.