It did not take long before these coins were modified to be the exact weight of the 500 yen coin, nor was it difficult. Counterfeiters would use them as slugs by drilling small holes on the surface of the coin to reduce their weight and fool vending machines which relied on weight to identify the coins. The large gap in value between the two coins meant that these thieves could make a good profit.
It did not take long before these coins were modified to be the precise weight of the 500 yen coin, which was not difficult. Counterfeiters would use them as fake coins by drilling small holes into the surface of the coin to reduce their weight and deceive vending machines that relied on weight to identify the coins. The substantial price difference between the two coins enabled these thieves to make a significant financial profit.