I'm not sure if a professional forensic study has been done but check out the bitcoin wiki page linked in my post. It contains links to his crypto mailing List

I'm not sure if a professional forensic study has been done but check out the bitcoin wiki page linked in my post. It contains links to his crypto mailing List posts and a couple of journalists who have tried tracking him down. The original bitcoin pdf suggests a British education but some of his other writing uses American spelling. And he probably isn't Japanese. The plot thickens.