Name list firm made ¥1.2 million selling Benesse client data


A name list trader who bought Benesse Corp.’s customer information from a systems engineer arrested last week resold information on some 4.5 million of the customers to an education company in Kyushu for ¥1.2 million (about $11,700), investigative sources said Friday.

The Tokyo Metropolitan Police Department examined materials seized from the Tokyo-based name list trader and found that the data on the 4.5 million customers was resold at one time, the sources said.

Also, the police found the sales slips show the trader resold data on 100 to 100,000 customers per case to the Kyushu company. The trader is thus believed to have resold data on about 5 million customers in total.

The firm also resold Benesse data to some 50 companies across the nation, including a preparatory school, a kimono retailer, a cosmetics firm and a photo studio, the sources said.

The MPD arrested Masaomi Matsuzaki, the 39-year-old systems engineer, on July 17 on charges of violating the unfair competition prevention law by copying customer information from Benesse’s database.

The police plan to charge him with unauthorized disclosure of trade secrets as well.