TOKYO - More Japanese companies, including the maker of Citizen watches, reported Tuesday unauthorized access to servers and possible leaks of personal information, with the Japanese government describing the situation as "serious."

GMO Research & AI Inc., a subsidiary of GMO Internet Group Inc., has said up to around 948,500 records of members of its infoQ survey website have been stolen, including members' names, email addresses, home addresses, phone numbers and encrypted passwords.

Related coverage:
Daiwa Securities' customer data may have leaked due to unauthorized access
Tokyo Metro says 59,000 customer email addresses may be compromised
Info leak suspected following unauthorized access to Japan gov't network