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DII-2026-00323
ReportedReported by fewer than three independent publishers, with no official finding.

Daiwa Securities says info on 110,000 clients may have been leaked in vendor incident

Takashi Nakamichi and Ryo Horiuchi report that Daiwa Securities, Japan’s second-largest brokerage and investment banking firm, is responding to a breach at one of its vendors. Daiwa Securities Group said information...

5 October 2026 · Hacking and intrusion
5 October 2026
DII-2026-003232 sources ↓
Quick facts
Category
Hacking and intrusion
Source
DataBreaches.net
Date
5 October 2026
Drafted by
Raidu Incident Detection

What happened

Not publicly disclosed.

Classification

Category
Hacking and intrusion
Industry
Financial services and insurance

Sources and evidence

This record was researched and written by the Index, based on the following original reporting.

DataBreaches.net
Daiwa Securities says info on 110,000 clients may have been leaked in vendor incident
5 October 2026
japantimes.co.jp
The Japan Times