google search on the DV-9900 reveals this post:Olympia DV-9900 available in Japan removes the mosaic censorship from DVD.
Basically, just hook it up between the DVD player and TV set. Turn it on, move a dial to adjust size of censored area, move the built in joystick over the censored area, and by manipulating 2 A/B switches, and 1 other dial, the mosaic clears up.
Tried it on 5 random Japanese DVDs, 3 different DVD players, and 2 different TVs. No problem with any of them.
A guy just sold one on EBay for $175. I did not pay that much, but it is well worth it. It is 100% legal in Japan, but you have to know where to look to find them.
Instructions are 99% Japanese, but all I needed was that 1% in English to figure it out. Took me about 15 minutes, but I am not very handy with electronics.
A couple of friends bought one on my recommendation, and it only took them 5 minutes to get it up and running.

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