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Information contained in this news release is current as of the date of the press announcement, but may be subject to change without prior notice.

May 17, 2017

Damages Caused by Ransomware, and Status of Recovery

Tokyo, May 17, 2017 --- Hitachi, Ltd. today announced the damages to the Hitachi Group caused by the "Ransomware" virus, and on the status of recovery.

Late at night on May 12 (Friday), a malfunction was detected in a part of Hitachi's in-house system. Early in the morning of May 13 (Saturday), a Countermeasure Team was assembled, to assess the situation and begin studying countermeasures. Failures had arisen in some parts of the in-house system, and from May 15 (Monday) onward, the virus affected functions including the transmission and receipt of e-mail. A Countermeasure Headquarters was formed for the Hitachi Group, and the efforts of Group entities worldwide have been brought to bear in efforts to achieve a recovery, with cooperation from partners and vendor companies as well. As of today's date, recovery is for the most part complete in e-mail systems affected by the virus, and a full recovery is expected before the end of this week.

We sincerely regret any inconvenience or concern caused to customers and other business partners as a result of failures in some areas of in-house systems due to the effects of the Ransomware virus.

No information leaks have been detected in relation to damages caused by the Ransomware virus, and the damages will not extend to customers or other outside parties through e-mail sent from Hitachi Group entities.

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