A number of Japanese companies have recently successively reported user data security incidents. H.I.S. Group, a major Japanese travel agency, said on the 7th that the servers of its Thai subsidiary were hacked, or that passport information for hundreds of customers was leaked. The day before, companies such as Citizen Watch Company also reported that their servers had been hacked and that customer information might have been leaked. According to Kyodo News, the Thai subsidiary of H.I.S. Group received an alert of unauthorized access to the server on December 11, 2025, and immediately cut off the connection between the relevant server and the network and restricted access. Follow-up investigations revealed that passport information from 627 customers may have been leaked, including name, gender, birthday, passport number and expiration date, and allergy information. H.I.S. Group apologized for the incident, saying that it was not immediately disclosed to the public because it took a long time to “properly analyze and verify” the large amount of data stored on the server. GMO Research and Artificial Intelligence, a subsidiary of the Internet Group GMO, said on the 6th that its questionnaire website InfoQ was hacked and 948,500 member records were stolen, involving member names, emails, addresses, phone numbers, and passwords. The company also said that membership point rewards totaling 2.9 million yen were unlawfully exchanged for Amazon gift card codes. Japanese discount retail company MrMax said on the 6th that the leak of customer information from servers used by corporate apps and online stores may affect 1.7 million customers. The leaked information includes names, emails, and phone numbers. Citizen Watch Co., Ltd. said on the same day that a server operated by a contracted company had been illegally accessed, and the personal information of about 100,000 customers may have been leaked. Japan's Chief Cabinet Secretary Minoru Kihara said at a press conference that the government attaches great importance to this series of events and will quickly gather information to assess the damage.

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