Thanks for the interesting input. Forensic linguistics coupled with corpus analysis is an interesting technique.

BTW, shouldn't your title be turned around? The usual sequence in English is to first mention the topic of discussion, followed by comments on the topic: "Satoshi Nakamoto is probably Wei Dai" seems more idiomatic.

"Satoshi Nakamoto is probably not a Japanese person" sounds natural.

"A Japanese person is probably not Satoshi Nakamoto" sounds odd.