Purchase of Japanese e-books through iBooks
I would like to purchase Japanese e-books. I heard that new version of iBooks to open to iBooks in Japan. I could see a lot of books available, but I cannot purchase because the store kept on saying to switch to US store where my account is. When I switch to US store, I do have an access to the Japanese books that I want. I just wouldn't like to download Japanese books by paying with my card to read. Please let me know simple how to by step by step.
iOS 6.1.4, Function of iBooks