Nope Maximum what can be achived - the first "Loading..." screen, where everything hangs.
No luck messing with 1.60 Jap Update either ...
Seems like a dead end.
For anyone who interested - almost every file in jap and US version is identcal - the biggest difference - START.DAT file, which contains some textures and texts. US Start.DAT has 15 more files then JAP one (when decompressed).
Who wants to try - you're welcome