DENTSU SOKEN INC.

The Time Sharing Service Division was established within Dentsu Tokyo Headquarters.

The first commercial time sharing service "MARK I" was launched through a technology partnership with GE.

In 1975, ISID was established as a joint venture between Dentsu and the U.S. General Electric Company (GE), launching a unique business of TSS (Time Sharing Service: a computer sharing service) at a time when there were no personal computers or the internet.

Dentsu International Information Services Co., Ltd. was established through a joint venture between Dentsu and GE.

In 1976, ISI-Dentsu of America, Inc. (now DENTSU SOKEN USA, INC.) was established, and Dentsu Research Institute was founded (the predecessor of the think tank organization "Dentsu Research Institute" of Dentsu Japan).

The Osaka office (now Kansai branch) and Nagoya office (now Chubu branch) were opened, and the provision of structural analysis systems on "MARK III" began.

ISI-Dentsu of America, Inc. (now DENTSU SOKEN USA, INC.) was established in the U.S.

In 1989, ISI-Dentsu Singapore Pte. Ltd. (now DENTSU SOKEN SINGAPORE PTE. LTD.) was established in Singapore.

Continued acceptance of orders for system development and operation services for Dentsu's internal information systems.

The Hong Kong branch (now DENTSU SOKEN HONG KONG LIMITED) was established in Hong Kong.

Established ISI-Dentsu Singapore Pte. Ltd. (now DENTSU SOKEN SINGAPORE PTE. LTD.) in Singapore

In 1993, a joint venture with International TechneGroup Inc. led to the establishment of ITI DICO Consulting Co., Ltd. (fully acquired in 2010, integrated into our company in 2024), the establishment of ISID Fairness Co., Ltd. (integrated into our company in 2023), and the establishment of ISID South East Asia (Thailand) Co., Ltd. (now DENTSU SOKEN (THAILAND) LIMITED) in Thailand.

Started providing the 3D design software I-DEAS Master Series (now NX) from Structural Dynamics Research Corporation (at the time) in the United States

Started providing the consolidated accounting software SCOPEⅡ

Started providing the integrated personnel solution STAFFBRAIN

Started providing the product lifecycle management (PLM) software Metaphase (now Teamcenter) from Structural Dynamics Research Corporation (at the time) in the United States

Opened the Hiroshima office (now Hiroshima branch)

Established ITID Consulting Co., Ltd. through a joint venture with International TechneGroup Inc. (fully acquired in 2010, integrated into our company in 2024)

Acquired Keichou Co., Ltd. (now Dentsu Research IT Co., Ltd.) as a subsidiary (integrated into Dentsu Research Technology Co., Ltd. in 2026)

Established ISID Fairness Co., Ltd. (integrated into our company in 2023)

Acquired ISID (now ISID Techno Solutions Co., Ltd.) as a subsidiary (integrated into our company in 2009)

Started providing the integrated HCM solution POSITIVE

Started providing the consolidated accounting software STRAVIS

Started providing the integrated financing software RiskTaker (now BANK·R)

Established ISID South East Asia (Thailand) Co., Ltd. (now DENTSU SOKEN (THAILAND) LIMITED) in Thailand

In 2006, ISID Advanced Outsourcing Co., Ltd. (now Dentsu Research Institute Secure Solution, now Dentsu Research Institute Technology) was established, the West Japan branch was discontinued, and the Kansai, Chubu, and Hiroshima branches were established. ISID Business Consulting Co., Ltd. (integrated into our company in 2024) was established, PT. ISID Indonesia (now PT. DENTSU SOKEN INDONESIA) was established in Indonesia, and the Toyota branch was established.

Acquired Estec Co., Ltd. as a subsidiary

Started providing the design and development support software iPRIME NAVI (now iQUAVIS)

Established ISID Advanced Outsourcing Co., Ltd. (now Dentsu Research Technology Co., Ltd.)

Closed the West Japan branch and established the Kansai, Chubu, and Hiroshima branches

Established a new organization for developing new businesses through advanced technology utilization, the Open Innovation Research Institute (now Open Innovation Lab)

Made KooJit Co., Ltd. an affiliate

Launch of the marketing platform service "iPLAss"

Resumption of business by ISID South East Asia (Thailand) Co., Ltd

Establishment of ISID Business Consulting Co., Ltd (integrated into our company in 2024)

Establishment of PT. ISID Indonesia (now PT. DENTSU SOKEN INDONESIA) in Indonesia

Establishment of the Toyota branch

In 2014, ISID Engineering Co., Ltd. was established (integrated into our company in 2022).

Establishment of ISID Engineering Co., Ltd (integrated into our company in 2022)

In 2015, Two Pillars GmbH was established in Germany and became a subsidiary (became a subsidiary in 2023), Mitsubishi Estate Co., Ltd. and FINOLAB Co., Ltd. were established and became subsidiaries, Seven Bank Co., Ltd. and ACSiON Co., Ltd. were established and became subsidiaries, and ISID Bright Co., Ltd. (now Dentsu Research Institute Bright) was established.

Change of fiscal year end to December 31

Opening of the industrial hub "FINOLAB" in the Otemachi area to support the growth of FinTech startups

Establishment of Dentsu Digital Co., Ltd and the "Dentsu Digital Marketing Technology Center"

Establishment of Two Pillars GmbH in Germany and its conversion into a subsidiary (became a subsidiary in 2023)

Launch of the expense settlement system "Ci*X Expense"

Acquisition of PT. Ebiz Cipta Solusi in Indonesia (integrated into PT. ISID Indonesia in 2021)

Conversion of Smart Holdings Co., Ltd into a subsidiary

Establishment and conversion into a subsidiary of Mitsubishi Estate Co., Ltd and FINOLAB Co., Ltd

Establishment and conversion into a subsidiary of Seven Bank Co., Ltd and ACSiON Co., Ltd

Establishment of ISID Bright Co., Ltd (now Dentsu Research Bright)

2021, 50th anniversary of founding

Launch of the Dentsu Group cross-organization "Dentsu DX Ground"

Launch of the group consolidation accounting system "Ci*X Financials"

Announcement of the long-term management vision "Vision2030"

Transition to the Prime market of the Tokyo Stock Exchange

Launch of the municipal solution "minnect"

Launch of the corporate generative AI solution "Know Narrator"

Renamed to "Dentsu Research & Consulting Co., Ltd."

Merged ITI and ISID Business Consulting, acquiring Dentsu Research & Consulting, the think‑tank organization of dentsu Japan

Fully acquired Mitsu‑Links Co., Ltd.

50th anniversary of founding

Established the "Dentsu Research & Consulting Economic Security Research Center"

Launch of the fund management system "Ci*X Treasury"

Established the "dentsu Japan AI Center" with four domestic dentsu group companies

Started the mid‑term management plan "Societal Evolution Implementation 2027"