Not to sure if anyone else has posted but just in case no one has I can tell you how to get it. This works for xbox one and ps4 all you got to do is go to your location settings change it to Japan then find infinite warfare beta on the marketplace it will come up as free. Once you find it click install and then just change your location back to where you are the only problem is the game will stay in Japanese unless once the download starts quickly cancel it then change your location to where you are and then redownload as the game will be in your download section. And there you have it the infinite warfare beta.

-Symptom