Internet Initiative Japan is engaged in the provision of a comprehensive range of Internet connectivity services, WAN services, outsourcing services, systems integration and equipment sales to Co.'s customers mainly in Japan. Co.'s principal services are full-spec IP service, closed-network services, security-related outsourcing services, web server hosting and e-mail security service, as well as systems construction and systems operation and maintenance. Co., through its subsidiary, is engaged in the operation of ATMs and its network systems and receives a commission for each bank withdrawal transaction when a customer uses its serviced ATMs. As of March 31, 2018, Co. has 1,096 ATMs.

Japan Post Bank is a commercial banking group based in Japan. Co. is engaged in banking operations as a member of the Japan Post Group with total assets of Y209,568,820 million as of Mar 31 2017. Co.'s principal operations comprise deposit-taking, syndicated loans and other lending, securities investment, domestic and foreign exchange, retail sales of Japanese government bonds and investment trusts as well as insurance products, intermediary services including mortgages, and credit card operations. Co. provides its products and services through a nationwide network of approximately 23,826 post office. In addition Co. maintains a network of 234 banking branches.

Mitsubishi UFJ Financial Group is financial groups with total assets of Y297,185,019 million as of Mar. 31, 2017. Co. is the holding company for The Bank of Tokyo-Mitsubishi UFJ, Ltd., Mitsubishi UFJ Trust and Banking Corporation, Mitsubishi UFJ Securities Holdings Co., Ltd., Mitsubishi UFJ Morgan Stanley Securities Co., Ltd., Mitsubishi UFJ NICOS Co., Ltd., and other companies. As a bank holding company, Co. is regulated under the Banking Law of Japan. Its services include commercial banking, trust banking, securities, credit cards, consumer finance, asset management, leasing and many more fields of financial services.

Nippon Telegraph and Telephone and its subsidiaries conduct the following main business activities: regional communications (domestic intra-prefectural communication services and incidental services), principally operated by Nippon Telegraph and Telephone East Corporation and Nippon Telegraph and Telephone West Corporation; long-distance and international communications (domestic inter-prefectural communication services, international communication services and incidental services), principally operated by NTT Communications Corporation; mobile communications, principally operated by NTT DOCOMO, Inc.; and data communications, principally operated by NTT DATA CORPORATION.

Nomura Research Institute is mainly engaged in the provision of consulting, financial and industrial IT services, and IT platform services. Consulting Services segment offers management consulting and system consulting services. Financial IT Solutions segment provides IT services including system development, operation outsourcing, and shared-online services for securities, insurance, banking, and other financial industries. Industrial IT Solutions segment provides IT services for distribution, manufacturing, service, and healthcare industries. IT Platform Services segment offers IT infrastructure services, managed services, and advanced information technology services.

NTT Data is an information technology ("IT") company mainly engaged in the provision of system integration and network system services. Along with its affiliates, Co. operates in five business segments: public & social infrastructure, financial, enterprise & solutions, North America, and EMEA & LATAM. Co. provides IT services including system integration, network information, consulting, business solution, and system support services to its customers in various industries both domestic and overseas. Co.'s principal products and services are "Accel-Mart," "Aggregate Master®," "Tableau™," "IMDA®," "IsleLinX®," "BRIMOS®," "RemoteOne®," "WinActor," "ANSER," and "AnserDATAPORT®."

Sumitomo Mitsui Financial Group is a holding company of the group mainly engaged in the provision of finance services. Co. offers services include deposits, loans, securities transaction, securities investment, domestic and foreign exchange, futures trading, bond fiduciary and registration, trust, security investment trust and insurance over-the-counter sales; leasing business; securities business; consumer finance, automobile sale finance business, venture capital business, business consulting, membership business, loan business, factoring, system development, information processing, money collection, swap related and investment adviser, among others.