A company in Japan found thousands of “phantom” coins, believed to have been destroyed after World War II, in a warehouse. Photos show the rare ceramic currency. Shofu Inc., a dental equipment ...

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.

years / Getty Images. Vance Cariaga . Tue, Aug 6, ... Here are 12 Japanese coins or coin sets with values that rise to nearly $2 million, according to the CoinValueLookup website.

From online pictures of the hoard, it appears that many of the coins have square holes. Related: 7.5-foot-long sword from 4th-century Japan may have 'protected' deceased from evil spirits ...

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.

The Japan Mint identified the unusual discs as a rare type of WWII currency known as “phantom” coins, according to an Oct. 18 Facebook post. Photos show the reddish brown coins.