😫 Kindle frustrations! Registering an amazon.co.jp account

I don’t mind paying, also having multiple accounts / emails is OK.

I can search Kindle store language easily, but Amazon will always detect that my account is not in Japan.

On my Android tablet, I set my display language to Japanese, and sign in to my supposed JP account. At first glance, Kindle app asked me for a Japanese mobile phone number, but I don’t have one. (Pressed 後で.) After that, when I tried to purchase a book, download button doesn’t appear. I can still add to waiting list. Then, when I go to the waiting list, there is a download button, but after that, it tells clearly that my account isn’t inside Japan.

Yes, I want to avoid paper by all means as well.