[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f39x90lust8yas":3},{"success":4,"breach":5},true,{"_id":6,"name":7,"title":8,"slug":7,"domain":9,"breachDate":10,"addedDate":11,"modifiedDate":12,"contentUpdatedAt":13,"source":14,"sourceUrl":15,"sourceUrls":16,"pwnCount":17,"affectedCount":17,"affectedCountStatus":18,"affectedCountLowerBound":19,"affectedCountUnit":20,"hasEnglishDescription":4,"severity":21,"dataClasses":22,"description":27,"seoTitle":15,"seoTitleEn":28,"seoDescription":15,"seoDescriptionEn":29,"logoUrl":30,"isVerified":4,"isSensitive":31,"isSpamList":31,"isMalware":31,"company":32},"68e3266eda11adda488253ce","toumei","Toumei Data Breach","toumei.co.jp","2023-10-18T00:00:00.000Z","2023-10-27T07:16:19.000Z","2026-07-03T14:58:02.905Z","2026-07-18T23:59:43.687Z","Third party breach","",[],76682,"known",null,"unknown","Medium",[23,24,25,26],"Email addresses","Names","Phone numbers","Physical addresses","\u003Cp>The Toumei data breach is an incident dated October 2023 associated with the Japan-based consulting and business services firm Toumei. The record contains 76,682 unique email addresses. The data categories are email addresses, names, phone numbers, and physical addresses. Although the raw data size is reported to be much larger, the basic scope shown to the user is unique emails and associated contact fields.\u003C\u002Fp>\u003Ch2>Types of Leaked Data and Their Risks\u003C\u002Fh2>\u003Cp>When email, name, phone, and address fields are found together, targeted messages can be prepared in the context of personal and business communication. In the field of business services, fake contract, consulting, invoice, proposal, customer support, or address verification messages may appear more convincing.\u003C\u002Fp>\u003Cp>When fields such as name, email, phone, address, username, or location come together, attackers can prepare messages that appear as if there is a real service relationship with the user. This information alone does not always mean account takeover; however, it can be used for phishing, fake support requests, delivery notifications, account verification, and personalized fraud flows. The record does not list password or payment card fields. Nevertheless, phone and physical address make it easier to reach the user directly. If the email is a work account, the risk can intersect with organizational processes in addition to the individual user.\u003C\u002Fp>\u003Ch2>Verified Scope and Boundaries\u003C\u002Fh2>\u003Cp>The incident date is recorded as October 18, 2023, and the number of affected emails is 76,682. Security records indicate a claim of more than 100 million rows and approximately 10 GB of data, showing name, phone, and physical address fields with 77 thousand unique email addresses among them. The existing record is compatible with these data categories.\u003C\u002Fp>\u003Cp>The raw number of rows should not be confused with the number of unique emails. A very large number of rows may consist of duplicates, system records, or related fields. The correct check for the user is whether the email address is included in this record.\u003C\u002Fp>\u003Ch2>User Groups at Risk\u003C\u002Fh2>\u003Cp>Users at risk may be customers, business partners, or contacts listed in relation to Toumei services. Work emails are more valuable for fake offer and invoice messages.\u003C\u002Fp>\u003Cp>Users with a phone number and physical address can be targeted both via email and phone calls. A Japan-based business relationship context can make fake messages in the local language or with the company name appear more realistic.\u003C\u002Fp>\u003Ch2>Urgent Measures to Be Taken\u003C\u002Fh2>\u003Cp>Users in the matching field should check that they use a unique password for the related work and personal accounts. Invoices, quotes, address verification, or customer support requests must be verified through a secondary channel.\u003C\u002Fp>\u003Cp>Instead of opening incoming links directly, the user should log in through the known web address or official application of the relevant service. Knowing the caller's name, email, address, order, or profile information does not prove that they are trustworthy. One-time verification codes, payment card information, or account passwords should not be shared in any support conversation.\u003C\u002Fp>\u003Ch2>Long-Term Security Strategies\u003C\u002Fh2>\u003Cp>In the long term, the habit of using a password manager, unique passwords, two-factor authentication, and removing unnecessary personal information from accounts reduces risk. Reusing the same email address on different platforms makes it easier to combine data from different breaches; therefore, using a separate email or alias for critical accounts can be considered.\u003C\u002Fp>\u003Cp>Internal approval processes and supplier verification should be strengthened in accounts related to business services. Requests for changes in payment, address, or authorized personnel received via email should not be implemented without a second written approval.\u003C\u002Fp>\u003Ch2>Record Control and User Action\u003C\u002Fh2>\u003Cp>LeakData check indicates whether the queried email address is found in this record. A positive result does not necessarily mean that all data fields definitely belong to that user; however, it is a sufficient warning for precautionary measures. A negative result only indicates that there is no match in this dataset, and does not eliminate the possibility of appearing in other breaches.\u003C\u002Fp>\u003Cp>A positive result increases the risk of business communication and targeting by phone. A negative result means that there is no match within this record; the same email address should be checked separately in other business service records.\u003C\u002Fp>","Toumei Data Breach (76.7 Thousand Reported Records)","Toumei Data Breach. 76.7 Thousand reported records were reported. Reported data: Email addresses, Names, Phone numbers. Review the scope, risks, and…","\u002Fuploads\u002Flogo\u002Ftoumei_co_jp.webp",false,{"name":33,"sector":34,"country":35,"website":9,"websiteArchiveUrl":15,"websiteStatus":15,"websiteCheckedAt":19},"Toumei","Business Services","Japan"]