yes they are, but I don't know about the latest in japanese cell phones. certainly 3 years ago they were way ahead of us. their cell phones just make so much more sense. you can do the bump thing with a standard phone there, for instance.
I don't really care about the tech stuff/being up to date as long as it works ok, and I don't have to have a separate phone for when I am here/when I am there. from what I reckon it should be fine for my needs