Just to be clear - the region doesn't matter, but the video format does. There are Region 2 discs that are NTSC, and there are Region 2 discs that are PAL. If it's Japanese, then it's almost surely NTSC. If it's European, then it's probably PAL.
If your TV can only do NTSC, then set the output on the player to NTSC. Hopefully, it will convert the PAL video (assuming that's what your DVDs have) to NTSC.