The life of a young, Japanese schoolgirl is destroyed when her family is killed by a Ninja-Yakuza family. Her hand cut off, she replaces it with various machines-of-death, and seeks revenge.
look I've seen some Euro, american, easetern Eros and Sth American porn. But Jav has something more. It has (in my opinion) better looking actresses, more fetishes and no one can do cute porn like JAV. So JAV wins hands down.
there are copy protection for files but are verry rare you downloaded any. the best bet would either change the file to english and shorter than 20 characters and you should be fine.