So, to get this straight-
He was born in Japan, every human in the country mysteriously discovered his identity and cast him out of his home country as a collective force, leaving literally no way for him to remain in the country where he had been born and raised. He travelled around for a while before moving to America (known for its casual relationship with Japan in history, especially during WWII) and joined the MILITARY, who of course would trust a Japanese guy with no history. Then, naturally, he decided to travel to the UK for some insubstantial reason.

Is that about right?