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D.I.System Co.,Ltd. — Investor Relations & Filings

Ticker · 4421 ISIN · JP3548810005 T Telecommunications, computer programming, consultancy, computing infrastructure, and other information service activities
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Filings indexed 47 across all filing types
Latest filing 2025-12-24 M&A Activity
Country JP Japan
Listing T 4421

About D.I.System Co.,Ltd.

https://www.di-system.co.jp/

D.I.System Co., Ltd. is an information technology services provider specializing in system integration, education, and security solutions. The company engages in system development and IT infrastructure construction, including network services and Microsoft solutions, aimed at improving corporate operational efficiency. A key focus is on modernizing internal business systems to streamline workflows, resolve common IT frustrations, and support work style reforms. In addition to its integration services, the company offers comprehensive security solutions to safeguard digital assets and provides education services to enhance technical skills and IT literacy within client organizations.

Recent filings

Filing Released Lang Actions
訂正臨時報告書
M&A Activity Classification · 100% confidence The document is a 'Temporary Report' (臨時報告書) filed with the Kanto Local Finance Bureau in Japan. It details the acquisition of a subsidiary (株式会社エム・アイ・シー) by the company (株式会社ディ・アイ・システム), including the purpose, financial data of the target, and the transaction schedule. In the context of Japanese corporate filings, this is a regulatory disclosure regarding M&A activity. Since the filing category 'M&A Activity' (TAR) is specifically defined for merger proposals or takeover bids, this document fits that category perfectly.
2025-12-24 Japanese
確認書
Regulatory Filings Classification · 100% confidence The document is titled '確認書' (Confirmation Letter) and explicitly states it is filed under the Financial Instruments and Exchange Act Article 24-4-2. It serves as an officer certification confirming the accuracy of the contents of the Annual Securities Report (有価証券報告書). According to the 'CERTIFICATION RULE', documents that are primarily officer certifications or attestations should be classified as Regulatory Filings (RNS), even if they reference a specific report type. FY 2025
2025-12-23 Japanese
有価証券報告書－第29期(2024/10/01－2025/09/30)
Annual Report Classification · 100% confidence The document is a Japanese 'Yuka Shoken Hokokusho' (Securities Report), which is the Japanese equivalent of a 10-K annual report. It contains comprehensive financial statements, management discussion, and business performance data for the fiscal year ending September 30, 2025. It is a formal regulatory filing submitted to the Kanto Local Finance Bureau, not an announcement or a summary. FY 2025
2025-12-23 Japanese
確認書
Report Publication Announcement Classification · 100% confidence The document text contains the header "第２四半期報告書" (Second Quarter Report) and explicitly mentions the reporting period ("第29期中（自 2024年10月１日 至 2025年３月31日）"). It also includes a confirmation statement regarding the appropriateness of the semi-annual report's contents, signed by the CEO and CFO, referencing the Financial Instruments and Exchange Act ("金融商品取引法"). This structure strongly indicates a comprehensive financial report covering a period shorter than a year, which corresponds to the definition of an Interim / Quarterly Report (IR). The document is not merely an announcement of a report (RPA/RNS) but appears to be the core content or a summary thereof, confirming its status as the report itself.
2025-05-14 Japanese
半期報告書－第29期(2024/10/01－2025/09/30)
Interim / Quarterly Report Classification · 100% confidence The document is a '第２四半期報告書' (Second Quarter Report) for the company '株式会社ディ・アイ・システム' (D.I.System Co., Ltd.). It contains detailed financial statements, including the balance sheet and income statement for the interim period (2024-10-01 to 2025-03-31), and explicitly mentions it is prepared in accordance with the Financial Instruments and Exchange Act. This fits the definition of an Interim/Quarterly Report (IR). H1 2025
2025-05-14 Japanese
確認書
Audit Report / Information Classification · 98% confidence The document text contains Japanese characters and includes the header "有価証券報告書（通常方式）" which translates to 'Securities Report (Regular Format)'. It explicitly mentions the submission date (2024年12月25日), the company name, and confirms the accuracy of the '第28期...有価証券報告書' (28th period Securities Report) covering the fiscal year ending September 30, 2024, as required by the Financial Instruments and Exchange Act. A comprehensive Securities Report filed annually in Japan is equivalent to the US 10-K filing. Although the document itself appears to be a confirmation statement ('確認書') related to the report, the core subject matter is the annual securities report, which aligns best with the '10-K' category for official yearly reports covering full financial performance. FY 2024
2024-12-25 Japanese

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