Business cards carry a lot of weight in Japan, so much so that they can be used to devastating effect if someone decides to deploy them for criminal purposes.

A recent case highlights the danger that comes with placing trust in such cards. At the end of August, prosecutors in Tochigi Prefecture indicted a former employee of a subsidiary of travel agency JTB Corp. on suspicion of fraud.

Yoshinobu Tamura, 49, is suspected of swindling 51 people out of a total of ¥2.4 billion in a currency exchange scam.