Yes the japanese power supply does work in North America but it is not good for the system.
Just to be clear..... If you open a PAD-124 (Japanese PCE Duo Black) power supply and open up a US TurboDuo power supply they are exactly the same.
The extra 10v from our wall outlets will just make the stock power supplies run a little warmer. But anyone with a US Duo has been doing this since they came out in the US.
When it comes to replacement power supplies you want to find good voltage regulated supplies, with around the same volts output and at least the same or higher mA output.
7805 voltage regulators inside the machine are designed to handle between 7 to 35v I believe. So your just fighting a heat battle with the 7805 and there heatsinks. Keep the voltage max 12v regulated power supply minimum 9v with at least 1.5mA output.
Just find a connector or an adapter for a power supply that fits the unit properly with the correct polarity.
This one here has the correct polarity (center negative) and it is 5.5x2.5 the same as the original according to gamesx chart. It's 12v and 3A so it should handle everything fine. There may be better options out there, but this one would get the job done.
http://www.ebay.com/itm/Mains-12V-3A-5-5mm-2-5mm-Center-Negative-AC-DC-Adapter-Charger-Power-Supply-Cord-/232058403905?hash=item3607c23c41:g:5tcAAOSw~y9ZC9O~I havn't tested it myself but from all the specs this is more then enough and it wont run any hotter then the stock power supply. I know it says 9v on the stock power supply but they output more toward 16v and when plugged into the system they output more toward the rated values but still typically higher then the rated value. As they are not regulated power supplies.