Photos show the reddish brown coins. “Phantom” coins or “phantom” currency are an unusual type of Japanese Yen coin made of ceramic during the metal shortages of WWII, according to an FAQ ...

TOKYO -- Japan's 5 yen coin is becoming more expensive to produce amid higher materials prices and an unfavorable exchange rate, raising the possibility that the per-coin production cost will ...

The Japanese 5-yen coin is about 22 mm in diameter and 1.5 ... effect during the accident 4 but also about shielding by modern Japanese houses, given that the coins were recovered from indoors.