My lady has an Arisaka rifle that she inherited from an uncle who has since passed. The story I got was that the uncle had picked up the rifle while on occupation duty.
I believe that it's a Type 98, but it has VERY few markings. There's no sign of a chrysanthemum on the receiver (or any other identifying mark) nor does it seem to have been removed. The only markings I've found are "30" near where the serial number should be and 579 on the stock.
The rifle is about 50 1/2 inches long, the peep/ladder sight is graduated from 3 to 17 (no wing extensions) and the front sight is a single blade. The dust cover is still present. The stock and metalwork all appear to be well manufactured and finished.
I'm not sure of the caliber but according to my gauge, the muzzle is approximately 7mm in diameter.
I can provide pictures upon request.