On Sunday morning, Shimomura rose early, and dressed in jeans, sunglasses, a baseball cap, and an old T-shirt.

Finally, each volunteer was told to memorize a PIN. They could keep ten per cent of the cash. After making nineteen withdrawals, they should wait an hour before visiting another 7-Eleven.

The volunteers were told to choose the Japanese language when prompted-an indication, Shimomura realized, that the cards were foreign. If anybody made twenty withdrawals from a single A.T.M., his card would be blocked. The gangsters should each withdraw a hundred thousand yen at a time (about nine hundred dollars) but make no more than nineteen transactions per machine. They could not use a regular bank A.T.M., or one in another convenience store. The superior read instructions from a thin manual: early the next morning, a Sunday, they should go to any 7-Eleven and use their white card at the store’s A.T.M. There was no chip on the card, no numbers, no name-just a magnetic strip. Each volunteer was given a plain white credit card. The superior finally arrived, and the five men moved into a private room. Like many yakuza, he is of Korean descent, and two of the others were also Korean-Japanese for a while, they spoke in Korean. (Shimomura, who has since left the Yamaguchi-gumi, asked to be referred to only by his surname.) When Shimomura showed up, he found three other gangsters, none of whom he knew. The superior assured him that the scheme was low risk, and instructed him to attend a meeting that evening at a bar in Nagoya. But he was a minor figure in the organization: a collector of debts, a performer of odd jobs. Thirty-two years old and skinny, with expressive eyes, he took pride in his appearance, often wearing a suit and mirror-shined loafers. It was May 14, 2016, and Shimomura was living in the city of Nagoya. When one of his superiors asked him if he wanted to make a pile of fast money, he naturally said yes. Shimomura was a member of the Yamaguchi-gumi, the largest yakuza crime family in Japan.

Hacked army games