July 16, 2024

Sumitomo Heavy Industries, Ltd. (Head Office: Shinagawa-ku, Tokyo; Representative Director, President, and CEO: Shinji Shimomura; hereinafter “SHI”) has discovered that due to unauthorized access to SHI Group servers in February 2024, the personal information of SHI and SHI Group company employees has leaked.
We deeply apologize for any inconvenience and concern this situation may cause to affected individuals.

1. Personal information that has or may have been leaked
Relevant individuals: SHI and SHI Group company employees * including some former employees
- Name
- Affiliation information (company name, department, position)
- Company telephone number
- Company email address
At this time, the personal information that has been confirmed to be leaked is only the company email addresses of 69 individuals.

2. Details of information leakage
It has been confirmed that on February 4, 2024, unauthorized access occurred on SHI Group servers.
A subsequent investigation revealed that the personal information of SHI and SHI Group company employees had leaked.
Further, this information leakage has been reported to the Personal Information Protection Commission of Japan.
(Reference) Unauthorized Access to SHI Servers February 9, 2024

3. Taking care of individuals whose personal information leakage has been confirmed or is suspected.
We have individually contacted the relevant individuals.
Note that this announcement serves as alternate measures toward some individuals who could not be contacted.

4. Preventive measures
We take seriously the factors that led to this event, and SHI will strive to build and thoroughly strengthen an information security structure stricter than ever before by, e.g., renewing existing networks and security systems, thus endeavoring toward preventive measures.

【Contact information】
Sumitomo Heavy Industries, Ltd.
Corporate Communications Dept.
Tel: +81-(0)3-6737-2332
Email: shi.zshi_koho@shi-g.com