6) No place names
7) No unit designators
8) No dates
Apparently, there were a lot of fakes either created for sale to GIs who wanted a trophy but failed to capture one or which were commissioned by GIs who wanted a trophy but failed to capture one. Six of one, half a dozen of the other at this late date.
If I were you I would take comfort in discovering it is a fake. That means he didn't have to steal it from a living prisoner or....worse....rob a dead body for it. Nor does it hold the slightest bit of sentimental value for the descendants or surviving relatives of a Japanese soldier who died in the war and who might want it back, since it was a fraud from the get-go. This is a 100% guilt-free souvenir of the time, place, and era. Enjoy it.