The seller was, in fact, right - one of them is from the WWII era. (The other one might not be, but only barely.)
The holed coin is a 10 sen from 1944 (Showa 19) - Numista entry here.
The un-holed aluminium piece is a 1 sen from 1938 (Showa 13), and corresponds to this Numista entry.
Both are fairly common types, though the aluminium is a less common early date (which might explain why the seller thought it was from the WWII period - Japanese dates are not very obvious).
The holed coin is a 10 sen from 1944 (Showa 19) - Numista entry here.
The un-holed aluminium piece is a 1 sen from 1938 (Showa 13), and corresponds to this Numista entry.
Both are fairly common types, though the aluminium is a less common early date (which might explain why the seller thought it was from the WWII period - Japanese dates are not very obvious).



















