finance.biggo and The Mainichi reported a data breach at SMBC Consumer Finance (Japan) on 4 November 2026, and it has been confirmed. It affected 320,118 customers.
What we know as of
Status
Confirmed.
People affected
320,118 customers.
What was exposed
Driver’s license numbers, Email addresses, Phone numbers, Dates of birth, Names, Addresses, Employer information and Annual incomes.
When
First reported 4 November 2026.
How
Hacking, through card loan guarantee system.
SMBC Consumer Finance’s record
No earlier breach on record under this name.
Not known yet: when it began and who was behind it. This page is updated as notices and statements come in.
Every fact above has its source below. Journalists: free to quote with credit (“Privacy Unpacked data breach tracker”, with a link to this page and the date); the figures can move. Follow this breach (feed) · Every major breach · Ask us for a figure
People affected
320,118customers
Reported
4 November 2026News report and 1 more
What was exposed 10
Driver’s license numbers
Email addresses
Phone numbers
Dates of birth
Names
Addresses
Employer information
Annual incomes
Guaranteed amounts
Contract details
How it happened
How
Hacking a third party gained unauthorized access to the system used for its card loan guarantee businesssource
Way in
card loan guarantee system unauthorized access to the system used for its card loan guarantee businesssource
Confirmed by SMBC Consumer Finance: SMBC Consumer Finance announced on November 5 that a third party gained unauthorized access to the system used for its card loan guarantee business, with customer data for up to 320,118 people transmitted externally
Confirmed by SMBC Consumer Finance Co.: SMBC Consumer Finance Co. said Thursday that personal information of up to 320,000 customers had been leaked following unauthorized access to a system used for loan guarantees and other services
News reports are read by an AI model; every fact taken from an article was checked word for word against it, and anything it could not find was dropped. · Corrections and changes
Questions about the SMBC Consumer Finance breach
Was SMBC Consumer Finance hacked?
finance.biggo and The Mainichi reported a data breach at SMBC Consumer Finance (Japan) on 4 November 2026, and it has been confirmed. It affected 320,118 customers. How it happened, by the sources: hacking, through card loan guarantee system.
What data was exposed in the SMBC Consumer Finance breach?
Driver’s license numbers, Email addresses, Phone numbers, Dates of birth, Names, Addresses, Employer information, Annual incomes, Guaranteed amounts and Contract details, by the notices and reports on this page.
How do I know if I was affected?
Organisations normally tell the people whose data was involved, by letter or email, and that notice says what of yours was in it. We cannot look up individual people. If you got a notice, check that it is real, then follow the steps on this page.
Is there a SMBC Consumer Finance data breach settlement?
No settlement open for claims is on record for SMBC Consumer Finance as of 15 November 2026. Every open settlement is listed with its deadline.
Is a letter, email or text about the SMBC Consumer Finance breach real or a scam?
A real notice names the breach, says what data was involved and never asks for a password, a code or a payment. Criminals often send fake notices after a breach is in the news. Do not use links or phone numbers in the message: go to SMBC Consumer Finance’s own site, or check the letter here.
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