There has been increasing talk that this was a fake, including hidden saves and loads edited together and the thing being run on an emulator at 1/30th speed. Here is a translated version of the supposed creator's web page describing the forgery: http://babelfish.altavista.com/babelfish/urltrurl?lp=ja_en&url=http://soramimi.egoism.jp/emu.htm

Take it with a grain of salt.