the manual will be on the sony site if you really need it.
Thats all my mates have done in the past with their jap import ones, lucky them I say, as I've got a US import one with the not so great LCD screen, and I've got a few dead pixels.
Shall replace the LCD screen on my own when it gets really bad thou.
The only thing will be that you can only play movies of Japans region, which is 2 (same as UK).
Mines a region 1 but it still plays region 2 UMD movies, without the need for third party software