Yes that would be the old Keibin site.
Japanese version..? Well, unfortunately it doesn't exist. At least AFAIK.
Just because someone posted something long ago doesn't make it real.
The only other person that could probably have made any such files would be TK. And I seriusly doubt it.
You could ask him. But unfortunately he never shows any interest in EAW.
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btw; I found the list and url of the public ftp stuff I was referring to. Still available.
ftp://ftp.atari.com/patches/eaw/
Index of ftp://ftp.atari.com/patches/eaw/
Up to higher level directory
Name Size Last Modified
European Air War.pdf
5015 KB 10/05/2011 12:00:00 AM
eaw.zip
3 KB 10/05/2011 12:00:00 AM
eawpixpac.zip
5046 KB 10/05/2011 12:00:00 AM
eawv1-1.exe
5851 KB 10/05/2011 12:00:00 AM
eawv1-1.txt
2 KB 10/05/2011 12:00:00 AM
eawv1-1f.exe
5853 KB 10/05/2011 12:00:00 AM
eawv1-1f.txt
2 KB 10/05/2011 12:00:00 AM
eawv1-1g.exe
5858 KB 10/05/2011 12:00:00 AM
eawv1-1g.txt
2 KB 10/05/2011 12:00:00 AM
eawv1-1s.exe
5862 KB 10/05/2011 12:00:00 AM
eawv1-1s.txt
2 KB 10/05/2011 12:00:00 AM
eawv1-2.exe
5877 KB 10/05/2011 12:00:00 AM
eawv1-2f.exe
5870 KB 10/05/2011 12:00:00 AM
eawv1-2g.exe
5878 KB 10/05/2011 12:00:00 AM
eawv1-2i.exe
739 KB 10/05/2011 12:00:00 AM
eawv1-2s.exe
5878 KB 10/05/2011 12:00:00 AM
You have this url since I got the url from your site