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Japan: Data Breach Incidents by Country / region

Search incidents by company, country, industry, year and attack method. Review affected data, impact, verification status, company responses and sources.

Country / region: JapanReset
767 results
CardsTable
Title / subjectOrganizationsVerificationReported impactDisclosed
Haebaru Town: Arcadia intrusion may have exposed disaster-mail and call-service registrant data南風原町InvestigatingUnknown2026-10-20
Miyakojima City: Arcadia intrusion may have exposed disaster-mail registrant data宮古島市InvestigatingUnknown2026-10-20
JETRO website breach exposes company contacts and staff information独立行政法人日本貿易振興機構ConfirmedUnknown2026-10-19
Kanuma City: Arcadia intrusion may have exposed data on 106 people related to 119 Raiden / Net119鹿沼市Investigating106 People2026-10-19
Hashimoto City: SpeeCAN RAIDEN intrusion may have exposed Hashimoto disaster-mail registrant data橋本市InvestigatingUnknown2026-10-19
Trustbank Furusato Choice: 4,454,097 member records leakedトラストバンクConfirmed4,454,097 Records2026-10-19
Ymir Link: personal data of client companies exfiltrated from Cuenote FC email platformユミルリンクConfirmedUnknown2026-10-19
Tosa City: vendor intrusion may have exposed 119RAIDEN and NET119 registrant data土佐市InvestigatingUnknown2026-10-17
Shibayama Town: SpeeCAN RAIDEN intrusion may have exposed resident and staff mail registrant data芝山町InvestigatingUnknown2026-10-16
Inami Town (Hyogo): Arcadia intrusion may have exposed staff and fire-corps mail registrant data稲美町InvestigatingUnknown2026-10-16
Possible exposure of 6,412 Raksul form-submission records through Studioラクスル株式会社Investigating6,412 Records2026-10-16
Nikkei reports about 1.83 million development-cloud entries leaked株式会社日本経済新聞社ConfirmedUnknown2026-10-16
Iwai Cosmo Securities: data of 4,611 online-trading customers leaked via contractor TradeWorks岩井コスモ証券Confirmed4,611 People2026-10-16
Wako City: SpeeCAN RAIDEN intrusion may have exposed notification registrant data和光市InvestigatingUnknown2026-10-16
Aomori City: Arcadia SpeeCAN RAIDEN intrusion may have exposed disaster-mail and related registrant data青森市InvestigatingUnknown2026-10-16
Mima City: vendor intrusion may have exposed data on 328 disaster-notification registrants美馬市Investigating328 People2026-10-16
Takarazuka City: vendor intrusion may have exposed 39 NET119 and 308 119RAIDEN registrants宝塚市InvestigatingUnknown2026-10-16
FANCL and Attenir: e-commerce member data leaked (368,184 and 417,312 people respectively)ファンケル, アテニアConfirmedUnknown2026-10-16
Kameyama City: vendor intrusion may have exposed staff-assembly mail registrant data亀山市InvestigatingUnknown2026-10-15
Takayama City: Arcadia intrusion may have exposed NET119 registrant data高山市InvestigatingUnknown2026-10-15