I wish I had read this post 4 weeks ago, as I just got back from Japan. I had ordered the very same b-mobile card via amazon.com. It arrived with Japanese only instructions, the English help phone line had meager opening hours and was constantly busy.
Best was that on top of the 3000+ Yen price tag, the instructions (according to my wife) say that for verification you need an active mobile number in Japan (duh!), if not, they can set up an account for you for another 2500¥ …
So, I ended up sending it back. Next time I will check the airport pick up option.
