Nakamoto has never revealed any personal information when discussing technical matters,[21] though has at times provided commentary on banking and fractional-reserve banking. On his P2P Foundation profile as of 2012, Nakamoto claimed to be a 37 year-old male who lived in Japan;[22] however, some speculated he was unlikely to be Japanese due to his native-level use of English[21] and his bitcoin software not being documented or labelled in Japanese.