> JapanHacked_Cybersecurity incidents in Japan

Company

Yamamoto Paper Packaging Co., Ltd.

Yamamoto Paper Packaging Co., Ltd. (Miyakojima-ku, Osaka, Osaka; Wholesale and retail trade) appears in 1 related cybersecurity incident. The latest was disclosed on 2025-09-17.

Profile

Industry/type: Wholesale and retail trade
Location: Osaka, Osaka, Miyakojima-ku
Website: https://www.yamagen-net.com/

Public figures

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Metric	Value	Scope	As of	Source
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Incident history

Disclosed 2025-09-17Updated 2026-02-16 17:17Osaka[Resolved][Severity: Critical][Breached][Critical]
Yamamoto Paper Packaging: the payment application of "Package Shop.jp" was tampered with, and data on 3,973 customers, including 1,395 card records, may have leaked
[Web app exploit][Data leak]Leaked 1.4KOrganizations 1

		Incident	Role	Impact level				Methods	Impacts		Status
2025-09-17	2026-02-16 17:17	Yamamoto Paper Packaging: the payment application of "Package Shop.jp" was tampered with, and data on 3,973 customers, including 1,395 card records, may have leaked	[Breached]	[Critical]	[Critical]	1 Yamamoto Paper Packaging Co., Ltd.	Osaka	[Web app exploit]	[Data leak]	1,395	[Resolved]