Japan, hands down.

It was an amazing experience, because everything is done so meticulously with great attention to detail. You can walk into a 7-11 and have a better meal from the frozen section than most restaurants in north america.

The restaurants there, especially the ramen and sushi are another level (though this may mean you can't enjoy these foods at home anymore).

And the parks in the cities and the scenery in the country side are beautiful.

Highly recommend you go, though not sure if they accept Bitcoin, I went before I discovered it. A quick look at BTC Map shows its not many places unfortunately.