At
http://patches.ubi.com/devil_may_cry_3/
US and EURO versions are available...
Both have securom protected exe, did not bother to check if it is working with Daemon since I have original disc...
...AND if you copy Japanese DMC3SE.exe game works flawlessly, did binary compare and all files are the same EXCEPT jap version have one additional file id6818.pac but I assume this is only needed for JAP version since in EUR/US exes id6818.pac is mentioned inside files also but not installed..plus, oc, readme files are in english. Point is - JAP exe is the same as EUR/US version but without securom. You can install JAP patch and you'll get the same thing..
Regards