You'll find plenty of sites with service manuals, bodywork books, & tuning info...
What they all have in common is the insert credit card no. here_______________ field at the bottom.
Just go to autobarn for basic stuff.
Unless its fairly specific info you want & your car is an import or something rare? Iv got a GX81 Mark II. If its something like that you have no choice but to wait for it on the net, then employ your best niponese translator.