Confirmed

Hokuyo Bank: Super Arca card-loan customer data leaked via SMBC Consumer Finance guarantee breach

Hokuyo Bank announced on November 5 that SMBC Consumer Finance, guarantor of its Super Arca card loan, reported that a system intrusion leaked data of current and applicant customers.

Last updated: 2026-11-09

Overview

No bank-specific count published (count blank). Names, gender, birth dates, addresses, phones, emails, driver-licence numbers, employer and contract data; ID-document images not included. This stems from the intrusion into SMBC Consumer Finance's guarantee system (recorded separately); the figure is a subset of that scope and must not be added to it.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. カードローン「スーパーアルカ」の外部保証会社における個人情報の漏えいについて株式会社北洋銀行 · 2026-11-09

Related information

smbc-cf-guarantee-system-data-exfiltration-2026

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