A lot has been written on how the iPhone performs in Japan, the world’s most advanced mobile nation, but the general consensus in this country now is that it sells very well (even though both Apple and provider SoftBank Mobile refuse to break down Japan-specific sales numbers). It’s rumored that the number of iPhones sold in Japan has passed 3 million.
There are reasons for this success (super-low pricing, aggressive marketing, Apple’s pre-iPhone brand popularity in Japan, clever product positioning by SoftBank, etc. etc.), but we’re talking about a country in which basically every cell phone is a smartphone, a country where you’d be hard-pressed to find a handset without a digital TV tuner or e-wallet function, for example.

iPhone big in Japan (Ha!)
Japan’s smartphone market: The iPhone is huge, the BlackBerry and Android aren’t
Video: Sharp’s chocolate cell phone
Apple sells only 5,000 official iPhones in China