DOCOMO Responds to Ministry Guidance Concerning Accident Prevention, Communication Security and Personal Information Management

NTT DOCOMO, INC. announced that today it submitted a report on extensive measures taken by the company in response to the “Guidance Given to NTT DOCOMO, INC. Concerning Accident Prevention, Protection of Secrecy of Communication, and Suitable Control of Personal Information,” which the Ministry of Internal Affairs and Communications (MIC) issued on January 26, and in response to a request for a full inspection of network infrastructure and operations to prevent interruptions in mobile telecommunications, which was issued on February 22 by an MIC liaison committee on countermeasures against mobile phone communication failures.

In its report, DOCOMO explains the 16 countermeasures it carried out, spending 3,940 person-days to resolve interruptions that occurred in the company’s mobile communications network, and another 17 measures to prevent similar interruptions from occurring in the future, which required 65,640 person-days.

DOCOMO also has completed an inspection of its network infrastructure and operations covering 145 categories and comprising 256,966 items, which required 90,450 person-days.

As a result of extensive companywide measures and inspections, DOCOMO has confirmed that its communication network can be operated stably. Going forward, the company will continue to strengthen its network infrastructure to support growing smartphone traffic, including countermeasures for an increasing volume of control signals.

Further, DOCOMO has improved its procedures for quickly and accurately informing customers about the operational status of its networks. The company has also re-examined its construction plans and procedures, fully taking into account the impact on customers.

DOCOMO apologizes sincerely for any inconvenience caused by past network interruptions and confirms its commitment to satisfy customers with stable and reliable mobile communications going forward.

Attached is the summary of DOCOMO’s report submitted to MIC.

(Attachment) Summary of Measures Taken to Prevent Mobile Communications Service Interruptions, Protect Secrecy of Communication and Appropriately Manage Personal Information

About NTT DOCOMO
NTT DOCOMO is a world-leading integrated-services company centered on mobility. The company serves over 60 million mobile customers in Japan via advanced wireless networks, including a nationwide 3G network and one of the world’s first commercial LTE networks. Leveraging its unique capabilities as a mobile operator, DOCOMO is a leading developer of cutting-edge technologies for NFC mobile payments, mobile GPS, mobile TV, intuitive mobile assistance, environmental monitoring, smart grids and much more. Overseas, the company provides technical and operational expertise to eight mobile operators and other partner companies. NTT DOCOMO is listed on the Tokyo (9437), London (NDCM) and New York (DCM) stock exchanges. Please visit www.nttdocomo.com for more information.