>Japanese handset makers have historically struggled abroad
I'm not sure why this has to be the case for Android phones though. Sure the older "keitai" phones weren't exportable but I'm not sure why that would be the case for the Android phones being produced now. The Japanese carriers do slap on really nasty looking UI themes to the Android phones to make them more attractive to the keitai users but surely if that just ship plan old Android on the export models there isn't much difference between any of the other Android handsets on the market.
On the other hand even the local smart phone market is flooded with Korean handsets because the ones being produced by Japanese makers aren't specced high enough to present any competition. I wonder if the Japanese makers can't produce really nice Android phones because of a lack of local technology i.e. Japanese firms want to use Japanese chips but all of the big semiconductor makers got rolled into Renesas and although Renesas does have some ARM chips they don't have the sort of chips that TI, Samsung etc have.