Here's a quick litmus test when someone proposes a Satoshi candidate X: "how did $X pay for DigiRock hosting of bitcoin.org in August 2008 when DigiRock accepts only yen and has no English language support?"
Only yen could be worked around through a prepaid card, stolen card number, gratis account, and probably other methods I'm not aware of.
Lack of English support doesn't necessarily make the person Japanese. Westerners can learn Japanese or use translation tools.
The point of the test is to quickly asses whether the person trying to dox Satoshi has done even their basic homework and realized that it's an issue for their theory? If they haven't even looked at the Bitcoin.org WHOIS history, that says something important about the depth of their research into the question.
The NSA is SN.
Crypto knowledge? Check.
Ability to hide identity? Check.
Cultural expertise? Check.
Everything else that could possibly be needed? Check!