To those asking (begging?) for Android: Japan is iOS-country
The still rather big share of Android lies in the fact that until last fall the biggest carrier did not carry the iPhone, which changed with the 5S/C, so I would expect that gap to even widen a little in the next quarters.
Source
No matter how you slice it - the Android userbase is too big to ignore if you are developing mobile titles. Its always a question of available resources, but sooner or later the apps will end on Android. Putting them on iOS first is easier because of limited numbers of devices, so testing is easier.