I have bought a new Kindle Oasis which I want to use for Japanese content. I have read several threads here on how to register a kindle in Japan but I still have problems to do so.
I currently have an account with Amazon (Germany) and with Amazon (Japan) with my real postal address (in Germany), two different email addresses and two different passwords.
I tried to open yet another account with amazon.jp planning to use a Japanese address. In the course of creating this account I am asked for an email address (I used yet another one) which was then verified by sending a temporary password to this email address. In the next step I was asked for a mobile phone number. I gave the only number that I have and was told that there already is an account connected to this phone number. I could have continued but my existing account would have been cancelled then.
So I gave up the idea of creating a second “Japanese” account with amazon.jp. I then tried to change the region of my existing account, but this didn’t work either. I get the message:
Clicking on “Manage Your Content and Devices” just reloads the same page.