







H2O Retailing Corp. is the latest major company among the many in Japan that are disclosing massive data breaches almost daily, which are exposing millions of customer records and revealing weaknesses in corporate cybersecurity.
Unauthorized access, personal data leaks surge in Japan | NHK WORLD-JAPAN News
A series of cyberattacks have led to leaks of large amounts of personal data from companies across Japan. Experts say the misuse of AI may be contributing to the growing threat. As this new challenge emerges, how should companies, and society as a whole, respond?
3 hacking methods primarily used in Japan data leaks | NHK WORLD-JAPAN News
A Japanese cybersecurity organization says that hackers have primarily used three methods in a recent spate of attacks that resulted in personal data leaks.
Over 16% of Japanese companies experience data breaches
According to the survey, 30.2% of large companies suffered or potentially suffered breaches, significantly higher than 14.3% among small businesses.

Japan data leaks mount as experts point to AI misuse
TOKYO -- Japanese companies and local governments have recently disclosed a series of personal data leaks. A white-hat hacker who monitors malicious c

Japan data leaks: Which poses greatest risk, licenses, credit cards or My Number cards?
TOKYO -- Leaks of personal information held by companies and other organizations have surged due to unauthorized access. The compromised data ranges f

Fuji TV, Sankei Shimbun announce fabricated data found in their polls
TOKYO -- Fuji Television Network Inc. and the Sankei Shimbun Co. on June 19 announced the discovery that some data in 14 joint opinion polls they cond

Mercor Data Breach | What You Need to Know
A massive data breach at AI startup Mercor exposes risks in AI supply chains, third-party tools, and data governance. Here’s what security teams need to know.

Japan police panel urges remote phone analysis to fight anonymous crime groups
TOKYO -- A Japan police advisory panel has proposed the early introduction of remote analysis of smartphones used by anonymous, fluid crime groups, de

IDMerit data breach: 1 billion records of personal data exposed in KYC data leak
A massive global data leak linked to IDMerit has exposed 1 billion personal records, including national IDs and emails, across the US, Europe, and Asia.

US Tech Companies Enabled the Surveillance and Detention of Hundreds of Thousands in China - Slashdot
An Associated Press investigation based on tens of thousands of leaked documents revealed Tuesday that American technology companies designed and built core components of China's surveillance apparatus over the past 25 years, selling billions of dollars in equipment to Chinese police and government ...

Information and Communications in Japan 2024
Massive AfD data breach exposes illegally copied files
The “Alternative for Germany” party apparently suffered a data breach. Some 421,000 emails were published, offering a glimpse inside the party.

GDPR - A Practical Guide For Developers - Bozho's tech blog
You’ve probably heard about GDPR. The new European data protection regulation that applies practically to everyone. Especially if you are working in a big company, it’s most likely that there’sContinue reading

Prince Group executive Hu Xiaowei arrested in Tokyo over $15B Bitcoin scam investigation
Tokyo police arrested Prince Group executive Hu Xiaowei over false residency charges tied to a $15 billion Bitcoin scam empire involving forced-labor fraud

Have I Been Pwned: AfD Data Breach
In September 2026, the German political party Alternative für Deutschland (AfD) suffered a data breach which exposed 345k unique email addresses. The following month, hundreds of gigabytes of data containing hundreds of thousands of emails and attachments was published online, with searchable AI-generated summaries and downloadable original files. An analysis of the incident reported that the breach was detected as early as 9 September, with a subsequent intrusion occurring five days later. In its public statement, AfD attributed the breach to an attack on a hosting provider, identified in subsequent reporting as the party-owned Alternita Dienstleistungs GmbH.
I’ve long been critical of the weak cybersecurity in Japan, but this is specifically about the series of data leaks circa September/October 2026 (hoping it won’t go on for longer). This is unfortunately such a huge I Told You So moment for me. My spreadsheet (which may or may not be up to date but is in English): drive.proton.me/urls/VJ0WNH1SHR#v9W2jUCoBQTX
サイバー対応特設サイト - 国家サイバー統括室
第374回 個人情報保護委員会 |個人情報保護委員会

2026年度の情報漏えい被害、2.6億人を超える

High-stakes standoff between GMO and hacker group escalates with first data leak

GMO、顧客にパソコン電源オフを要請 27日正午に攻撃との脅迫受け

サイバー攻撃、サイト経由型が急増 弱点探索にAI活用か―セキュリティー大手:時事ドットコム