Security product development and salesSecurity solution implementation supportSoftware design, development, and operationsIT infrastructure design, construction, and operationsUser support servicesEducation services (IT training and certification)
Names without a link are companies not yet registered in OpenBizGraph
§05
Network
NETWORK
Loading the relationship graph...
Drag to move · click to open
§06
History
57 EVENTS
December 1, 1902 (established).
Hodate Seisakusho Co., Ltd. was founded.
August 19, 1947 (company established).
Hodate Seisakusho Co., Ltd. was established.
Established Limited Company D.I.S. Systems with a capital of 3 million yen in Nihonbashi, Chuo-ku, primarily for software development.
Established an order center to handle order processing and expanded orders for network operation, management, and monitoring services.
Established an order center that handles order processing.
Capital increased to 10 million yen, reorganized from a limited company to a corporation, and moved headquarters to Kudanshita, Chiyoda-ku.
Capital increased to 10 million yen, reorganized from a limited company to a corporation, and relocated headquarters to Kudanshita, Chiyoda-ku.
Obtained approval for general labor dispatch business (now worker dispatch business).
Moved headquarters to Hirakawacho, Chiyoda-ku due to business expansion.
Established the Osaka branch of the West Japan Division due to business expansion.
Moved headquarters to Higashi-Shimbashi, Minato-ku due to business expansion, aiming to become a total solutions company.
Due to business expansion, relocated headquarters to Higashi-Shimbashi, Minato-ku.
Obtained ISMS certification, started corporate information security management consulting services, moved Osaka branch to Toyosaki, Kita-ku, Osaka due to business expansion, and launched education courses for information processing and network-related certifications.
Obtained ISMS certification. Started corporate information security management consulting services. Due to business expansion, relocated Osaka branch to Toyosaki, Kita-ku, Osaka. Established information processing and network-related qualification training courses.
Capital increased to 76 million yen.
Established an R&D center in Shimbashi, Minato-ku for technology research and development.
Obtained ISO/IEC 27001 certification.
Registered the trademark for the package software 'Cornelius'.
Obtained a patent related to security programs.
Established a solution center in Higashi-Shimbashi, Minato-ku and a development office for the Osaka branch in Toyosaki, Osaka due to business expansion.
Due to business expansion, established a Solution Center in Higashi-Shimbashi, Minato-ku, and a Development Office of Osaka Branch in Toyosaki, Osaka.
Obtained Privacy Mark certification
Acquired 100% ownership of Asiribe Minds Inc.
Opened the Nagoya branch of the Western Japan Business Division due to business expansion
Integrated operations in the Eastern Japan area and relocated headquarters to Nakano, Nakano-ku due to business expansion
Released the paperless solution 'SMART ZIRA' for tablet devices
Integrated operations in the Western Japan area and relocated the Osaka office to Nakanoshima, Kita-ku, Osaka due to business expansion
Due to business expansion, integrated Western Japan area operations and relocated Osaka office to Nakanoshima, Kita-ku, Osaka.
Increased capital to 82.35 million yen
Increased capital to 88.35 million yen
Increased capital to 97.05 million yen
Listed shares on the JASDAQ Standard market (stock code 4421) and increased capital to 273.69 million yen
Listed shares on the JASDAQ (Standard) market (stock code 4421). Capital increased to 273.69 million yen.
Relocated the Nagoya branch to Nishiki, Naka-ku, Nagoya City due to business expansion
Increased capital to 277.69 million yen
Capital increased to 290.04 million yen.
Opened a Yokohama satellite office due to business expansion
Obtained ISO 9001:2015 certification
Hota Manufacturing acquires shares of Yokoi Manufacturing Co., Ltd. and advances the integration of operations and organization.
DI System is responsible for implementing and supporting the 'COMPANY' system, achieving operational launch on schedule.
Increased capital to 290.94 million yen
Acquired 100% ownership of Stepcom Inc. and opened a Shizuoka satellite office due to business expansion
Made Stepcom Co., Ltd. a 100% subsidiary. Due to business expansion, established a Shizuoka satellite office.
Opened a Fukuoka satellite office due to business expansion
Transitioned to the Standard market due to the Tokyo Stock Exchange market reorganization
Acquired 100% ownership of Wize Systems Inc.
Increased capital to 291.09 million yen
Capital increased to 291.39 million yen.
Hota Manufacturing and Yokoi Manufacturing Co., Ltd. merge, beginning a new chapter in Hota Manufacturing's history.
Due to business expansion, increased and relocated the Fukuoka satellite office, and established the Fukuoka branch.
Due to business expansion, relocated headquarters to Marunouchi, Chiyoda-ku.
Capital increased to 291.54 million yen.
Made M.I.C. Co., Ltd. a 100% subsidiary.
Quest Consulting Co., Ltd. joined the group (100% subsidiary of Asirubrainz Co., Ltd.).
Due to business expansion, established a Yamaguchi satellite office.
§07
News
12 ARTICLES
AI Education Platform 'Pijetore', Introduced in Nikkei Digital Governance
On October 5, 2026, an article about the AI education platform 'Pijetore', provided by our subsidiary Asleebrains Inc., was published in Nikkei Digital Governance. The article introduced the AI-based personalized learning support features and the system that visualizes students' understanding and skill attainment. The company group will continue to promote the development of IT talent through practical training services utilizing AI.
Wiz Systems publishes column on risks of USB memory
Our subsidiary Wiz Systems has published a new column explaining the risks associated with USB memory in security environments. Even as cloud and online sharing become widespread, the use of USB memory remains important. The column discusses the risks and countermeasures related to malware introduction and personal USB devices.
Astly Brains Publishes New Column on the Value of Engineers in the AI Era
A new column, “An Era When AI Can Write Code,” has been published on the website of Astly Brains, a subsidiary of our company. It notes that generative AI can increase development speed, while a lack of understanding of code structure can raise risks. The column explains why it is important to understand and verify AI-generated code and discusses the practical, on-the-ground skills engineers will need.
D.I. System Publishes Free SCS★3 Readiness Self-Check
D.I. System Co., Ltd. has made available for free a self-check of readiness for the SCS assessment system’s ★3 level, provided by its consolidated subsidiary Weeds Systems. The 18-question self-check takes about three minutes and helps companies organize the status of their security measures and identify topics to review internally.
Aslead Brains Discusses Engineer Development in the Age of AI in New Column
In a column published by Aslead Brains, a subsidiary of the company, the authors explain how advances in generative AI are changing the nature of coding. Focusing on the growing separation between AI-generated code and understanding it, the column considers the skills engineers will need in the future.
Weeds Systems Publishes Column on Recovery
Weeds Systems, a subsidiary of the company, has published a column explaining the importance of backups and challenges in recovery as part of ransomware preparedness.
Di.I. System Achieves Over 300 Cases of Integrated HR System Support
Di.I. System Co., Ltd. announced that its support for the integrated HR system 'COMPANY' has exceeded 300 cases in total. Leveraging over 20 years of experience and extensive knowledge, it supports the construction and operation of HR systems for major companies.
Wiz Systems publishes column on SCS evaluation system
Our subsidiary Wiz Systems has published a column that helps organize the company's status regarding the SCS evaluation system.
D.I. System Co., Ltd. Featured in Shareholder's Notebook
It is stated that our article will be published in the Shareholder's Notebook (July issue) to be released on June 17, 2026, and we hope to deepen interest and understanding.
Wees Systems Publishes Security Column
The subsidiary Wees Systems published a column explaining a small and medium-sized enterprise model case for reviewing administrator IDs, prompted by the SCS evaluation system.
§08
Public records
GOV
National Tax Agency basic information3010401052264
Source: National Tax Agency Corporate Number Publication Site, basic three items
Trade name
株式会社ディ・アイ・システム
Trade name (kana)
ディアイシステム
Name in English
Corporation type
301
Address
〒100-0005 東京都千代田区丸の内２丁目１番１号
Postal code
1000005
Prefecture code
13
City code
101
Address outside Japan
Prefecture in English
City in English
Address outside Japan in English
Corporate number assignment date
2015-10-05
Update date
2025-04-09
Change date
2025-04-03
Registry closure date
Reason for registry closure
Successor corporate number
Details of the change
Latest record
1
Excluded from search
0
Processing type
12
Correction type
0
Trade name image ID
Address image ID
Sequence number
1595515
METI gBizINFO3010401052264
Source: gBizINFO (Ministry of Economy, Trade and Industry)
