Hehe, yeh thats the one. Great film that.
I got it off ED2K, the link is ed2k://|file|Femdom.-.Kitagawa.Pro.177.Part.II.[Japanese.Cbt.Ballbusting]_[link_by_www.eselpsychos.to].mpg|1226332968|4ABDEAA06EEC8400B38F835C8868B6FA|/
for anyone with emule or similar client who wants to grab it.
This is the link to the other one off ED2k ed2k://|file|Ballbust%20-%20Hard%20Ballbusting%20#01.mpg|1320631552|54A554F EE0881FBDEA7A834E0EEA6FFF|/

Thats a mad film too. The girls use an electric stun gun on guys nuts. They also get one fella and nail his ballbag to a table and stick a needle into each ball. Man, thats really got to hurt, I guess. Not something I've tried tbh.
Peace,
J