You will need a account specifically on Amazon.jp (your USA or Europe Amazon account won't work) to order here but otherwise all payment methods and such should work. You can change the site language at the bottom of the page.
Prices are (probably) in yen, you can covert easily with Google: ie "100 yen in usd"
We carry a small camera like this as a backup to our main camera, and as a way to get a crazy deep zoom. Our current one is pretty old and doesn't shoot in 4k, but this one does! With this we will be able to match our new 4k footage much cleaner.