A Japanese survey of mobile phone users, translated by What Japan Thinks, reports that only about 10% of Japanese mobile phone users say they have mastery (or a good command) over all the functions of their mobile phones (link). About 75% of users say they have mastered less than half of the functions in the phone.The most confusing functions were e-wallet, applications in general, music player, and Internet access.What Japan Thinks concludes that few people in Japan "are really comfortable with...