M3 announced on October 15 that personal information belonging to doctor members and pharmaceutical company representatives was leaked due to unauthorized access to the system for its pharmaceutical company service, "MR-kun."
The affected parties include less than 10% of all doctor members and several hundred pharmaceutical company representatives. The leaked information includes names, workplaces, and email addresses for some individuals, and the company is continuing to investigate the exact number of affected individuals and other details.
According to the company, login passwords and m3 points held by users are not included in the leaked information. The company also stated that it does not possess credit card numbers or similar sensitive data.

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