Well after doing some quick research.
I have identified that as a Japanese Arisaka Type 38 (6.5x50mm)
The numbers on the left side of the reciever mark it as.
Series: 24
Serial: 95,288
Arsenal: Kokura
Manufacture Date: ~1940
Most likely that mark on the center of the reciever was probably where the Imperial chrysanthemum mark existed. Those we're promptly removed from the captured rifles by US Forces...
Markings:
http://www.radix.net/~bbrown/japanese_markings.html