Q: I currently live and work in Japan, but I will soon retire in the United States. I have purchased music and iBooks for my iPhone 4S and my iPad 2 (owned by my Japanese university). How can I ensure that my music and iBooks will be transferred to my new iPhone and iPad that I plan to purchase in the U.S.? - James A: Restrictions on content purchased from the iTunes Store are based on the account with which the content was purchased, and have nothing…