Well, a more progressive and less costly method for transitioning is pretty high up there (I'm pre-everything at the moment) for coming back to the UK. Laws and society in Japan in regards to transgender are nowhere near what they are in the UK. Plus NHS. Say what you want about its current state, but it has helped me and my family so much over the years I dread to think what would have happened with a private/insurance based health care system.
Except when they talked me out of transitioning. That was a bummer.