There's no particularly easy way to pick up all of another country's major TV channels, as far as I'm aware, unless said country is nearby and they have unencrypted satellite transmissions.

I haven't heard anything about Japanese TV being made available via satellite in the UK, either - there's really no call for it, after all. The UK's Japanese immigrant population is very small, so basically it'd just be catering for a few random international students and wapanese.

> Are there any other obvious ways I'm completely missing?

Move to Japan?