I'm highly doubtful that anyone in Japan could/would use such flawless English, especially online and in code comments. The Englishisms might be a sign of a par

I'm highly doubtful that anyone in Japan could/would use such flawless English, especially online and in code comments. The Englishisms might be a sign of a paranoid American trying to obfuscate his writing, but I'd put my money on Satoshi being English, attributing any Americanisms to the fact that the internet is largely dominated by American English, so it's easy for anyone to pick it up without even realizing.