DOCOMO Systems improves service quality and reliability with Oracle

Japan's largest mobile service provider launches a cloud-based corporate information system to support shared services across 30 subsidiary companies.


Business challenges

With 60 million customers, DOCOMO Systems plans, develops, and maintains information systems primarily for the group companies within NTT DOCOMO.

DOCOMO wanted to improve Improve the performance, scalability, and reliability of the mobile service provider’s corporate information system to support future growth in user companies and data volume due to the expansion of the system to the entire NTT Group. In addition, it needed to deliver high-quality cloud services and attract more internal and external customers to use the information system by ensuring high availability and reducing the costs of building and maintaining the system.

Why DOCOMO Systems chose Oracle

DOCOMO Systems chose Oracle Exadata to integrate existing databases rather than developing additional individual databases because Oracle offers a high-performance, reliable, and scalable database platform, enabling the company to minimize IT operating costs. In addition, DOCOMO Systems selected Oracle Access Management Suite and Oracle Virtual Directory over other authentication products on the market for their superior features and cost-effectiveness.

“When we were evaluating multiple vendors, one of our key business requirements was using a standardized protocol to ensure rapid deployment of the information system to the other group companies. Oracle’s open architecture was clearly the right choice, helping us to reduce costs and improve our services,” said Hidenori Miyamoto, director, Cloud Systems Development Department, DOCOMO Systems.

“Using Oracle Exadata for data warehousing was another factor in our decision, as we plan to enable non-indexed searches in the corporate information system,” said Yusuke Yamane, director of the Cloud Systems Development Department at DOCOMO Systems.


After undertaking concept planning, DOCOMO Systems implemented Oracle Exadata to consolidate the databases for its corporate information system. The company conducted tests and launched the new database platform in approximately seven months. DOCOMO Systems subsequently deployed Oracle Access Management Suite and Oracle Directory Service for its identity authentication platform to complete the new architecture.

The company was able to reduce system operating costs by up to 30% and deliver more cost-effective services to NTT Group companies and external customers by integrating databases into Oracle Exadata Database Machine instead of developing and maintaining individual databases in the corporate information system.

Also, DOCOMO improved customers’ work efficiency by providing a high-performing and scalable database platform that can rapidly process massive volumes of business data, such as expense settlement, accumulated from a growing number of internal and external customers.

Oracle Real Application Clusters ensured reliable and high-quality service for customers to enable efficient sharing of server and storage resources for database services and achieve rapid failover should a server go down.

DOCOMO gained a flexible, cost-effective identity management platform to support future expansion by using Oracle Access Management Suite to integrate seamlessly with different customers’ authentication platforms, such as Lightweight Directory Access Protocol and Security Assertion Markup Language. Plus, customers do not need to reset their user IDs and can continue to use their existing ID system, which simplifies implementations.

The company enhanced user experience by providing a single sign-on service for multiple systems, enabling customers to rapidly access information, such as expense reports, and reset their own passwords.

DOCOMO enabled rapid deployment of the information system to NTT Group companies by using Oracle Virtual Directory to synchronize with user ID information from various authentication systems. This enabled easy connection with other software-as-a-service platforms.

Finally, the company increased data security by using Oracle Exadata to maintain a real-time copy of databases for user companies at two disaster recovery sites—ensuring rapid data recovery and minimal data loss in the event of an unexpected disaster.

Published:July 23, 2020