Found some old Japanese Yen among a WWII veteran's stash (I had permission)

[BABALONGOGGLES]

So, I was given the opportunity to go through a hoarder's house after they passed away. It wasn't too terrible, as far as hoarding goes, but among the accumulated garbage I found a shoe box with some mementos from the war. Among them are what I can only identify as Japanese Yen, presumably from before 1944, plus one 1943S steel penny. There are a bunch of different ones, but I can't figure out how to value them because I can't read the writing. I don't see any identifying marks on the two brass(?) coins, and the other one with a hole in the center is the only one that feels heavier than the tin/steel/aluminum(?) ones. Its luster is a bit more pronounced as well. Any help with ID or value is appreciated.

 

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[Dozer D]

Our TN foreign experts will assist for sure on these, however, take a pic of the reverse side of these coins so they can determine other info. Congrats on your WWII findings, or earlier by chance.

 

[Hobbs.]

It sounds like fun to I.D. the stuff and figure out what it is!

 

[PetesPockets55]

The copper/brass things look more like washers. No characters on them at all and a small circular incision around the center from a screw head.

The others definitely look more modern.

 

[A2coins]

Hope they have some value

 

[Guardrailnickel]

What else was in the box? Did you find any swords or sword parts?

 

[BLK HOLE]

Neat finds and welcome aboard

 

[unclemac]

the aluminum ones are war years (1941-43) 10, 5 and 1 sen coins. The one with the hole is 5 sen from 1933-38.