Japan Leisure Channel data breach
Japan Leisure Channel announced a data breach on Nov 4, 2026 affecting about 684,772 email addresses, exposing email addresses. It happened through a vendor (Arara (email delivery service)). No settlement or compensation has been announced.
Was I affected?
People who received Teleboat newsletters, Boat Race campaign prize notices or newsletters from the Mikuni, Biwako, Naruto, Shimonoseki or Karatsu racecourses, or prize notices from Hamanako or Marugame, between July 31 and October 31, 2026.
| Announced | Nov 4, 2026 |
|---|---|
| When it happened | Intrusion at email vendor Arara; people who received the emails between July 31 and October 31, 2026 are affected |
| Country | Japan |
| Email addresses exposed | 684,772 |
| Data exposed | Email addresses |
| Through a vendor | Arara (email delivery service) |
| Status | Confirmed by the company or a regulator filing |
What happened
Japan Leisure Channel, which runs services for Japanese boat racing including the Teleboat online betting system, said on November 4, 2026 that 684,772 email addresses leaked after an outsider broke into the email delivery service of Arara, its email contractor. The addresses belong to people who received Teleboat and racecourse newsletters or campaign prize notices between July 31 and October 31, 2026. Only email addresses were taken; names, home addresses and subscriber numbers were not.
What should I do?
- Be wary of emails claiming to come from Teleboat, a boat racecourse or a campaign office, and don't open their links or attachments.
- Don't enter personal details or PINs or reply to messages about prize wins or apologies for this leak.
- Check bets and prizes in the official site or app rather than through email links.
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Sources
- 弊社が委託したメール配信サービスに対する不正アクセス及び情報漏洩に関するお詫びとお知らせ (Apology and notice about unauthorized access and data leak at the email delivery service we used) · Japan Leisure Channel (in Japanese) · official