| Company name | Group | Parent | Subsidiary | Customer | Supplier | Alliance | Bank | Shareholder |
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Established as Nagano Electronic Computing Center Co., Ltd. in Nagano City, Nagano Prefecture.
Owned large computers and contracted to process municipal tax notices and ledgers in bulk.
Opened a Matsumoto branch office in 3-chome, Ote, Matsumoto City, Nagano Prefecture.
Opened an Iida branch office at Iida Chamber of Commerce Hall, Tokiwamachi, Iida City, Nagano Prefecture.
Changed the company name to Densan Co., Ltd.
Moved headquarters to Densan Building in Kencho, Nagano City, Nagano Prefecture.
Opened a Niigata branch office in 3-chome, Manada, Niigata City, Niigata Prefecture.
Commenced providing the newspaper layout editing system 'Cosmos'.
Opened a Tokyo branch office in Ginza, Chuo-ku, Tokyo.
Started operation of the supercomputer Uniback 1106.
Implemented an online system with Shinetsu Broadcasting.
Implemented a pioneering nationwide processing system for labor insurance collection.
Commenced providing hospital medical accounting system.
Changed the Tokyo branch office to Tokyo subsidiary.
Operated the comprehensive administrative system 'Reams', installing terminals in each municipality for online processing.
Changed the Niigata branch office to Niigata subsidiary.
The comprehensive administrative system 'Reams' received the Chairman's Award at the Ministry of International Trade and Industry's Informationization Monthly Promotion Conference.
Commenced providing the water utility billing system 'Warms'.
Opened a Saku branch office in Sarukubo, Saku City, Nagano Prefecture.
Commenced providing an online system for leasing businesses.
The all-product online ordering and receiving system provided to a large supermarket in Nagano City is now operational.
Launch of the Blue Card system for specialty stores.
Launch of the Reams SA (standalone) system.
Launch of Safes, a financial accounting system for local governments.
Launch of a POS system for retail stores.
Obtained certification as a system integrator from the Ministry of Economy, Trade and Industry.
Converted the Matsumoto office into a branch office.
Den-san Co., Ltd. received the Minister of Posts and Telecommunications Award during Informationization Month, contributing to regional informationization and the development of the telecommunications industry.
Four companies jointly exhibited the 'Miracle Theater' pavilion at the Shinshu Expo.
The agricultural administration system 'NOSEI' received the Chairman's Award at the Informationization Month Promotion Conference.
Launched the internet connectivity service provider business 'avis'.
Converted the Saku and Iida offices into branch offices.
Launch of the comprehensive administrative system 'Reams III'.
Obtained the first 'Specified Certified System Operation Company Certification (SO)' in Nagano Prefecture.
Launch of an ERP system for the manufacturing industry.
The official newspaper production system for the Nagano Winter Olympics received the Chairman's Award at the Informationization Month Promotion Conference.
Launch of the 'Long-Term Care Insurance Administration System' and the 'Long-Term Care Certification Support System' for local governments.
Started the 'Cable Internet Service' in partnership with Avis Inc. and Nagano Cable Television.
Launch of a system for long-term care service providers.
Launch of a long-term care network system.
ISO 14001 certification obtained
Launch of the general affairs and accounting system 'SMILE'
Relocation of the Niigata branch to Higashi-Ōdōri, Niigata City, Niigata Prefecture
Construction of a data center in Nagano City
Launch of the hospital ordering system
ISO/IEC 27001 certification obtained for the data center
Achieved CMMI Level 2
Launch of the comprehensive administrative system 'Reams .NET'
Privacy Mark certification obtained
Relocation of the Joetsu branch to Kida, Joetsu City, Niigata Prefecture
Acquired municipal-related business from Aozora Information Systems Co., Ltd. and began operations in October
Relocated Tokyo headquarters to Shinagawa, Chuo-ku, Tokyo
Changed Tokyo headquarters to Tokyo branch
Converted the Tohoku, Hokushin, and Joetsu branches into support service centers
Established the Yamanashi Support Service Center (Yamanashi SS) in Chuo City, Yamanashi Prefecture, replacing the Sado Support Service Center (Sado SS)
Relocated the Tohoku SS to Aoba, Sendai City, Miyagi Prefecture
Relocated the Hokushin SS to Sakuragicho, Omiya-ku, Saitama City, Saitama Prefecture
Relocated the Iida branch to Ginza, Iida City, Nagano Prefecture
Entered into a capital and business partnership with Nissho Electronics Co., Ltd.
ISO 9001 certification obtained
Listed on the Second Section of the Tokyo Stock Exchange market
Designated as a First Section stock on the Tokyo Stock Exchange market
Constructed a new headquarters and relocated to Nakacho, Tsuruga Nanase, Nagano City
Signed an exclusive domestic sales agreement for the electronic book creation and publishing system 'AirLibro' with Tanchao Co., Ltd.
Obtained ISO/IEC 20000 certification
Entered into a business partnership with Ainet Co., Ltd. for cloud services
Partnered with Japan System Co., Ltd. and began selling 'Reams Financial Accounting'
Supported Ainet Co., Ltd.'s data center expansion in the Chubu region
Dissolved capital and business partnership with Nissho Electronics Co., Ltd.
Obtained the next-generation certification mark 'Kurumin'
Commenced collaboration in security business with Enkareji Technology Co., Ltd.
Opened our research facility 'Fujimi Lab' within the Fujimimori office operated by Fujimi Town, Suwa District, Nagano Prefecture
Partnered with Intsumit Co., Ltd. and began selling the knowledge management system 'SmartKMS'
Acquired all shares of T.M.R. Systems Co., Ltd. and made it a subsidiary
Purchased the 'AirLibro' system source from Tanchao Co., Ltd. to enhance functionality and strengthen product competitiveness
Opened our research facility 'Minamiuonuma Lab' at the Global IT Park Minamiuonuma operated by Minamiuonuma City, Niigata Prefecture
Integrated the Tohoku Support Service Center into the North Kanto Support Service Center
Established the Yamanashi branch in Kofu City, Yamanashi Prefecture
Commenced provision of the new comprehensive administrative information system 'Reams'
Updated registration and obtained certification for the Information Security Management System (ISMS) (Nagano headquarters)
Signed a cybersecurity agreement with six organizations inside and outside the prefecture.
Released the AI visual inspection system 'Observe AI'.
Opened the Nagoya Support Service Center in Naka-ku, Nagoya, Aichi Prefecture.
Obtained ISO/IEC 27017 (ISMS Cloud Security) certification.
Transitioned to the Tokyo Stock Exchange Standard Market.
Signed a comprehensive collaboration agreement with Inzumit Inc. in the AI field.
Launched the generative AI chatbot 'SmartRobot × Azure OpenAI Service'.
Entered a capital and business partnership with TOPPAN Edge Inc. (now TOPPAN Inc.).
Transitioned from a company with a board of auditors to one with an audit committee.
Started providing the comprehensive administrative information system 'Reams', compliant with municipal system standard specifications.
Entered a capital and business partnership with ITSO Inc. regarding AI business.
Shinya Fujiwara participated in the FIM 6DAYS® Enduro of Nations 2026 held in Portugal from October 12 to 17, 2026, and finished the six-day race. This completion marks the second consecutive year, carries special significance as the 100th anniversary event, and provides valuable experience toward the Dakar Rally 2027.
Company Den-san showcased at the Local Government Informatization Promotion Fair 2026 held at Makuhari Messe on October 27-28. The booth introduced the comprehensive administrative information system "Reams", AI-powered automation of municipal office work, a no-writing window system, resident app, and tourism solutions. During the vendor presentation on the 27th, they explained their efforts to automate municipal operations by integrating AI technology with Reams and outlined their future vision.
Skater Koutaku Kuratoku participated in the 33rd All-Japan Speed Skating Distance Championships held at the M-Wave in Nagano City from October 23 to 25, 2026. He finished second in the men's 500m with a time of 34.80 seconds and fourth in the men's 1000m with a time of 1 minute 9.73 seconds. He was also selected as a participant for World Cup races 1 through 4.
In October 2026, two members of the drone team at Den-san Co., Ltd. passed the national qualification exam for "First-Class Unmanned Aircraft Pilot," bringing the company's total number of First-Class Unmanned Aircraft Pilots to three. With this achievement, the company has strengthened its system to provide high-quality drone services to municipalities and private enterprises, prioritizing safe operations.
E-Computer Co., Ltd. exhibited at the "Industrial Fair in Shinshu 2026" held at Nagano City Big Hat from October 23 to 24, showcasing AI visual inspection systems, service robots, and digital stamp rallies as tourism solutions. The booth attracted many visitors, and our services were also adopted in the digital stamp rally within the venue.
Due to server maintenance, our website will be temporarily suspended from 18:00 to 20:20 (scheduled) on Friday, October 23, 2026. The completion time may vary depending on the progress of the work, and the website will not be available during maintenance.
Den-san Co., Ltd. signed a sponsorship agreement with off‑road pro rider Shinya Fujiwara and the Dakar Rally 2027 project on September 24, 2026. Fujiwara will compete in the Dakar Rally held in Saudi Arabia from January 1 to 15, 2027, aiming to set a new record for Japanese participants. The company expressed its support for Fujiwara's challenge and stated that it would leverage the experience gained at the 2026 event to further step up in 2027.
Den-san Co., Ltd. will exhibit at the 'Industrial Fair in Shinshu 2026' held at Nagano City Big Hat on October 23-24. The exhibition will feature AI visual inspection systems, service robots, tourism solutions, and more. Participation is free, and we welcome many visitors.
Den-san Co., Ltd. will exhibit at the Local Government Informatization Promotion Fair 2026, held at Makuhari Messe on October 27-28, 2026. At the booth, we will introduce AI and DX solutions that streamline administrative services and reduce staff burden using generative AI, and also provide individual consultations on comprehensive administrative information systems.
On September 18, a private fair was held in Nagano City, attracting a diverse range of participants from manufacturing, healthcare, nursing care, and local governments. Solutions and seminars utilizing AI, robotics, and DX were showcased and conducted. The fair concluded successfully, with many participants expressing interest and expectations. The company also reaffirmed its commitment to addressing regional challenges through AI, robotics, and DX.