> JapanHacked_Cybersecurity incidents in Japan

Company

The Kiyo Bank, Ltd.

The Kiyo Bank, Ltd. (Wakayama, Wakayama; Finance and insurance) appears in 1 related cybersecurity incident. The latest was disclosed on 2026-11-05.

Profile

Industry/type: Finance and insurance
Location: Wakayama, Wakayama
Also known as: Kiyo Bank
Website: https://www.kiyobank.co.jp/

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2026-11-05Updated 2026-11-06 00:00Aichi, Ehime, Fukuoka, Gifu, Hiroshima, Hokkaido, Ibaraki, Kumamoto, Nagasaki, Niigata, Okayama, Tokyo, Wakayama, Yamagata[Investigating][Severity: Critical][Through a supplier][Major]
SMBC Consumer Finance: guarantee system breach leaks income and licence numbers of up to 320,000 people
[Intrusion][Data leak][Service outage]Leaked 320.1KOrganizations 15

		Incident	Role	Impact level				Methods	Impacts		Status
2026-11-05	2026-11-06 00:00	SMBC Consumer Finance: guarantee system breach leaks income and licence numbers of up to 320,000 people	[Through a supplier]	[Major]	[Critical]	15 DOCOMO SMTB Net Bank, Inc., SMBC Consumer Finance Co., Ltd., The Chugoku Bank, Limited, Aichi Bank, Ltd., The Bank of Fukuoka, Ltd., Daishi Hokuetsu Bank, Ltd., The Ehime Bank, Ltd., The Hiroshima Bank, Ltd., The Juhachi-Shinwa Bank, Ltd., The Kiyo Bank, Ltd., The Kumamoto Bank, Ltd., North Pacific Bank, Ltd., The Ogaki Kyoritsu Bank, Ltd., The Shonai Bank, Ltd., Tsukuba Bank, Ltd.	Aichi, Ehime, Fukuoka, Gifu, Hiroshima, Hokkaido, Ibaraki, Kumamoto, Nagasaki, Niigata, Okayama, Tokyo, Wakayama, Yamagata	[Intrusion]	[Data leak][Service outage]	320,118	[Investigating]