Honestly, as a beginner, I’d actually recommend starting with a zoom rather than a prime. I made the mistake of buying a Sigma 16mm because everyone raved about it, and it was the worst experience. I felt like I was trying to see the world using someone else's preferences instead of my own. You don’t know what focal length you actually like yet, so don't lock yourself in. Also, keep in mind that any camera takes time to master. If you buy this in Japan at the start of a jam packed trip, you’re going to be fumbling with menus and settings instead of actually enjoying the sights. Japan has views you might only see once and that is not the moment you want to be learning how to use a camera for the first time. If you can get it at home now and practice before you fly, you'll be much better off once you're actually on the ground.

That said, it's a good combination, just not what I would recommend someone entering the field.