Iris Ohyama, one of Japan's most recognized consumer goods manufacturers, has disclosed that a third-party cloud service used by its online shopping platform was accessed without authorization, potentially exposing personal data belonging to roughly 7.7 million people, including customers who never created an account.
The company, founded in 1971 and headquartered in Sendai, is best known for plastic storage solutions and home appliances sold across Asia, Europe, and North America. Its e-commerce platform, Iris Plaza, caters to millions of customers in Japan and handles a large volume of household product purchases. The scale of the breach puts it among the larger data security incidents Japan has seen this year, in a period when Japanese companies and government agencies have dealt with a string of serious intrusions.
How the Breach Was Detected
On October 28, 2026, Iris Ohyama staff detected suspicious files inside a cloud service that Iris Plaza relies on for its operations. The company did not name the cloud provider or describe the method the attacker used to get in. Within a day, the company suspended access to Iris Plaza and related systems, reported the incident to Japan's Personal Information Protection Commission, and filed a report with police.
A follow-up disclosure on November 5 gave a clearer picture of the scope: up to 5.8 million registered and former members may have had their data accessed, along with up to 1.9 million non-members, meaning people who had completed a guest checkout without registering. The fact that guest buyers are part of the exposure is insurmountable, since many people assume their data is not retained when they shop without creating an account. In Iris Plaza's case, it was.
What Data Was in the Affected System
The range of information potentially accessed varies depending on the type of account. For registered members, exposed fields can include full name, home address, phone number, email address, gender, and date of birth. Account passwords were also stored in the affected environment, though the company said they were encrypted. It did not specify which encryption method was used, leaving questions open about how resistant those passwords are to cracking.
Former members are in a slightly different position: Iris Ohyama said it does not retain passwords for accounts that have been closed, so that group faces a narrower exposure. For non-members who checked out as guests, the data stored was more limited.
One notable reassurance: the company confirmed that credit card information was not stored in the affected cloud environment, sparing customers from the most immediately damaging form of financial exposure.
As of November 5, Iris Ohyama said it had not received any communication from whoever carried out the intrusion, had not identified any perpetrators, and had not seen reports of fraudulent use or financial damage tied to the breach. The investigation into how many records were actually exfiltrated, as opposed to merely accessible, is still ongoing.
What Iris Plaza Customers Should Do Now
The company has urged customers to change their Iris Plaza passwords and, critically, to change passwords on any other service where they used the same credentials. Password reuse across sites remains one of the most common ways a single breach cascades into wider account takeovers. Anyone who shops with the same email and password combination across multiple retail or financial platforms is at elevated risk.
Iris Ohyama also warned customers to be on guard for phishing attempts. With names, addresses, phone numbers, and email addresses potentially in circulation, attackers have enough to craft convincing messages that appear to come from the company. Iris Ohyama said it will not send emails or SMS messages asking for passwords, PINs, authentication codes, or other sensitive information through links, and customers should treat any such request as fraudulent.
A Year of Costly Data Incidents in Japan
The Iris Ohyama breach lands in the middle of a rough stretch for data security in Japan. This year alone, cloud hosting provider Sakura Internet reported a hack affecting up to 1.36 million accounts, telecommunications giant KDDI disclosed a breach tied to a zero-day vulnerability in third-party software that hit around 12 million accounts across shared email platforms, and Japan's Digital Agency acknowledged that a VPN flaw exposed approximately 246,000 government personnel records. The common thread across several of these incidents is reliance on third-party services and cloud environments where access controls or vendor security fell short.
Iris Ohyama's breach fits that pattern. A third-party cloud provider, an intrusion the retailer only caught when suspicious files turned up, and millions of customer records sitting in an environment the company did not fully control. The investigation remains open, and the company has not said when it expects to restore Iris Plaza to service.
The exposed information included customers' names, business email addresses, phone numbers and business addresses. In some cases, the records also contained personal identification documents, including driver's licences, passports and utility bills.
DigiCert has started notifying affected customers about the incident. The company is also reviewing archived identification documents to identify the individuals whose personal documents may have been accessed.
According to an incident report published on Mozilla's Bugzilla platform, the security issue originated in February 2025, when DigiCert migrated an internal business system to a different availability zone. The migration inadvertently made the system accessible from the public internet, although it was previously restricted to users connected through a virtual private network (VPN).
The exposed system contained a self-registration feature designed for other applications. This feature allowed external users to create accounts without requiring the usual internal authorization.
Although these newly created accounts were not assigned to any particular application, an authorization vulnerability allowed them to access archived customer information in read-only mode.
DigiCert discovered unauthorized accounts on the exposed system in June 2026. However, the company initially believed that these accounts could not access customer records because they had not been assigned to an application.
The company received a report through its managed security research program highlighting the possibility of external users creating accounts on the system.
DigiCert implemented security measures to restrict access and address the authorization issue. However, it did not immediately recognize that customer information had already been accessed.
An investigation confirmed that an unauthorized account had accessed archived customer records between June 27 and July 2, 2026. DigiCert confirmed the data breach on October 19, 2026.
The company acknowledged that the incident was initially treated as an account-creation issue rather than a potential data-access incident.
The compromised records primarily contained business contact information shared with DigiCert during customer verification and other business processes.
However, some archived records also included sensitive identification documents submitted by customers. These documents could include government-issued identification, such as passports and driver's licences, as well as utility bills containing personal information.
DigiCert stated that the unauthorized account had read-only access and could not modify customer records, approve certificate validations or issue digital certificates.
After the investigation, DigiCert disabled the self-registration feature, restricted access to the affected system and introduced additional access controls to prevent unauthorized users from accessing archived information.
The company also confirmed that its core certificate authority services, including CertCentral and DigiCert ONE, were not compromised. Customer login credentials and previously issued digital certificates also remain secure.
Northflank provides a cloud-based platform that allows developers to deploy and manage applications, containers, databases and AI applications without having to manage the underlying infrastructure.
After the warning, Northflank advised customers to immediately change their environment variables and API keys stored on the platform. The company later issued a stronger warning, asking users to assume that all environment variables had been decrypted and that the sensitive information stored inside them had been stolen.
Environment variables are commonly used by applications to store sensitive information, including database passwords, cloud service credentials, authentication tokens and API keys. If attackers gain access to these details, they can use them to compromise other services, steal data or misuse accounts to generate unauthorized charges.
Northflank later confirmed that several customers had reported unauthorized use of AI API keys stored on its platform.
"Users have reported unauthorised use of AI API keys supplied to the Northflank platform," the company said in an update. It urged customers who had not yet changed their stored secrets to do so immediately.
The company also advised users to examine their AI service providers' usage and billing records for unusual activity. Any suspicious usage should be reported to Northflank and the relevant AI service provider.
According to the company's incident timeline, Wiz notified Northflank about the security breach at 11:43 UTC on October 30. Its engineering team began investigating the alert one minute later. Northflank initially introduced a network policy patch and deployed additional security updates at 12:50 UTC and 13:05 UTC. The company also requested assistance from Wiz's incident response team.
As part of its response, Northflank enabled credential rotation for PostgreSQL, MongoDB, MySQL and Redis databases. It also introduced audit logs for all customers, including users on free accounts, to help them identify suspicious activities.
According to Wiz, attackers are increasingly targeting environment variables that contain AI service credentials. Stolen API keys can be used in a practice known as LLMJacking, in which attackers exploit another organization's AI accounts to access expensive AI models without permission. They may also resell access to these services to other users.
In two cases investigated by Wiz, attackers used compromised enterprise credentials to make approximately 2.5 million requests to Amazon Bedrock, resulting in nearly $100,000 in AI usage charges.
In a statement published on October 8, 2026, Daiichi Kosho said it could not rule out the possibility that personal information stored on the affected computer had been exposed to unauthorized parties. But the company has not confirmed that the data was actually stolen or leaked.
“According to NCG, between October 1 and October 2, 2026, a malware infection was discovered on one of their employees' devices (a PC), and the device was isolated from the network on October 2. Following an investigation into the scope of the impact by NCG, we received a report from NCG on October 5,” read the statement.
After an initial investigation, NCG informed Daiichi Kosho about the incident on October 5. The investigation revealed that information collected through outsourced business operations had been temporarily stored on the compromised computer.
NCG has reset affected passwords and is investigating how the malware entered the system, whether information was accessed by unauthorized individuals, and the overall scope of the incident. The available information does not identify the malware.
Daiichi Kosho estimates that approximately 8.724 million records may have been affected. “Based on the information we currently have, approximately 8,724,000 customers who registered or made reservations at our stores may have had their names (registered names), genders, dates of birth, email addresses, and telephone numbers leaked to external parties,” the company warned.
The affected records are linked to customers who registered for membership or made reservations at the company’s establishments. The businesses include Big Echo, DK Dining, Mega Big, Karaoke Club DAM, Banana Club and B-Garage.
Daiichi Kosho has warned customers not to open unfamiliar links or attachments and to remain cautious when receiving unexpected emails, text messages or calls. The company has also clarified that passwords and credit card information are not included in the potentially exposed data.
As companies strengthen their artificial intelligence capabilities, the cybersecurity industry is poised for another record merger and acquisition (M&A) year. Momentum Cyber reported 117 deals in the third quarter of 2026, which represents an increase from 117 deals in the prior year. This increased activity is a reflection of a shift in security companies' purchasing strategies in order to keep up with rapid advances in artificial intelligence.
There is currently a strong demand for security solutions based on artificial intelligence and tools capable of protecting AI-powered systems, which is contributing to the current wave of acquisitions. Organizations are increasingly adopting agentic artificial intelligence, which can perform tasks with minimal human intervention. However, security has become an increasingly important concern as organizations adopt these systems.
Among the key areas of investment are identity and access management, nonhuman identity, data security, agentic security, runtime protection, and operational technology security. In 2025, there are estimated to be 404 cybersecurity mergers and acquisitions. This year's activity also set a record in terms of deal value, with companies spending approximately $97 billion on startup acquisitions.
It is expected that investment funding rounds will decrease slightly from last year's levels, but acquisitions have continued to gain momentum as established companies seek capabilities that would take a considerable amount of time to develop internally.
Artificial intelligence models have advanced dramatically and automated cyberattacks have increased the urgency of this issue. As a result of these developments, companies are reviewing their security requirements, creating opportunities for startups that are developing AI-based products. In order to expand their capabilities, large corporations are acquiring established startups in emerging security categories and investing in early-stage companies in emerging security categories.
AI-driven acquisitions have also become increasingly common among established technology companies. As of 2026, Palo Alto Networks acquired CyberArk for $25 billion, while other companies pursued specialized capabilities in identity security, data protection, and artificial intelligence infrastructures. These moves are a result of a wider effort to incorporate emerging technologies into existing security portfolios rather than solely relying on internal developments.
A growing segment of the market is also emerging outside of traditional cybersecurity vendors. Software providers are seeking ways of securing AI agents within business applications, while organizations managing operational technology need to safeguard the systems and connected devices controlled by increasingly autonomous software.
As concerns regarding the risks associated with artificial intelligence grow, cloud providers and advanced AI developers are emerging as potential buyers of security technologies. Although acquisitions have increased, Momentum Cyber's analysis indicates that venture capital and private equity firms are scrutinizing their funding decisions more carefully, making fewer deals but more substantial investments in selected companies.
Investors are assessing which technologies will remain relevant in a rapidly evolving market, attracting attention to startups with proven leadership and specialized capabilities. During the first three quarters of 2026, Momentum Cyber announced 40 AI security acquisitions, up from 10 transactions throughout 2025. These figures indicate the rapid growth of this segment.
AI is becoming increasingly integrated into a wider variety of cybersecurity products, making it increasingly difficult to distinguish between tools designed to protect AI systems from cyber threats and tools powered by AI. According to industry observers, hyperscale cloud providers and leading AI research companies will have a greater influence on acquisitions in the future.
Increasing reliance on secure AI infrastructure may make specialised security capabilities more valuable, further affecting the cybersecurity market's competition. In light of the continued transformation of cybersecurity by artificial intelligence, acquisitions are expected to remain a key strategy for companies seeking specialized knowledge and faster innovation.
As AI security, identity management, and automated threat protection become increasingly important to the security sector, it is expected that future investment decisions and competition will be influenced.