From Japan’s Masuda
The magician opens a plastic wallet to show there is nothing inside. There are five holes in the wallet. Spectators are convinced that the wallet is obviously empty because they can see through the holes in the case. But when the magician shakes the wallet, a playing card appears inside. The card is taken out from the wallet. Clearly the wallet does not have enough space to have concealed a card.
Both sides of the card are shown to the spectators, and they can see there are no holes in the card.