Okay excuse me, I assimilated "japanese movie" with "japanime"

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There is only one way to see if a movie is interlaced or not : you open in in DGIndex, you move the slide, and if you see some combo effect on the edges during camera movement, then the movie is interlaced (see
http://www.100fps.com/ dor more explanation).
But as true interlaced material are rare, I guess your movie is not. Did you set DGIndex to "Force Film" ? If not, then regenerate the d2v project using this setting.
Now what you have to do is to use the "optimal script" that you can find there :
http://www.kvcd.net/forum/viewtopic.php?t=3483
You will have to add a line
Code:
VobSub("nameofthesub.idx")
where the idx file is the one you created with Vobsub.
(you will need the "Vsfilter.dll" plugin that you can find here :
http://sourceforge.net/project/showf...ckage_id=84359 )