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RION CO.,LTD. — Investor Relations & Filings

Ticker · 6823 ISIN · JP3969700008 LEI · 353800R49MNMRJHQF556 T Manufacturing
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Filings indexed 60 across all filing types
Latest filing 2026-04-28 Regulatory Filings
Country JP Japan
Listing T 6823

About RION CO.,LTD.

https://www.rion.co.jp/english/

RION CO., LTD. is a manufacturer specializing in products derived from acoustics and vibration technologies. The company's operations are structured around three core business areas. The Sound and Vibration Measuring Instruments division develops and produces sound level meters, vibration meters, and seismometers for industrial fields and administrative bodies. The Particle Counter division offers airborne and liquid-borne particle counters used for cleanliness management in clean rooms across the electronics, pharmaceutical, and food manufacturing sectors. The Audiological Equipment division manufactures medical devices, including its Rionet brand of hearing instruments, and diagnostic equipment such as audiometers and OAE screeners.

Recent filings

Filing Released Lang Actions
2026年３月期　決算短信〔日本基準〕（連結）
Regulatory Filings
2026-04-28 Japanese
確認書
Report Publication Announcement Classification · 100% confidence The document is a 'Confirmation Letter' (Kakunin-sho) filed under the Financial Instruments and Exchange Act in Japan, specifically confirming the accuracy of the contents of a Semi-Annual Report (Hankishokokusho) for the period ending September 30, 2025. Since this is a regulatory filing confirming the validity of a report rather than the report itself, and it does not fit into specific categories like 10-K or IR, it falls under the general regulatory filing category.
2025-11-13 Japanese
半期報告書－第105期(2025/04/01－2026/03/31)
Interim / Quarterly Report Classification · 100% confidence The document is a '半期報告書' (Semi-Annual Report) filed by Rion Co., Ltd. in Japan. It contains detailed financial statements, including the balance sheet, for the interim period ending September 30, 2025. It is a comprehensive financial report for a period shorter than a full fiscal year, which fits the definition of an Interim/Quarterly Report (IR). H1 2026
2025-11-13 Japanese
臨時報告書
AGM Information Classification · 100% confidence The document is titled '臨時報告書' (Extraordinary Report) and explicitly states in Section 1 ('提出理由') that it is being submitted because resolutions were passed at the '第104期定時株主総会' (104th Annual General Meeting) held on June 25, 2025. Section 2 details the resolutions, including dividend approval, election of directors, and election of auditors, along with the voting results (votes for, against, abstentions). This content directly relates to the official results of a shareholder meeting. The filing type '臨時報告書' (Extraordinary Report) in Japan often corresponds to reporting significant events outside of routine filings. Given the focus on the *results* of the AGM resolutions, the most specific category is Declaration of Voting Results & Voting Rights Announcements (DVA). Although it relates to an AGM, the core content is the voting outcome, not the presentation materials (AGM-R) or the proxy solicitation (PSI).
2025-06-27 Japanese
内部統制報告書－第104期(2024/04/01－2025/03/31)
Governance Information Classification · 100% confidence The document is titled "内部統制報告書" (Internal Control Report) and explicitly references the legal basis as Article 24-4-4, Paragraph 1 of the Financial Instruments and Exchange Act ("金融商品取引法第24条の４の４第１項"). It details the scope, criteria, and procedures for evaluating internal controls over financial reporting, concluding with an assessment of their effectiveness as of the fiscal year-end (March 31, 2025). This structure and content precisely match the requirements for an Audit Report/Information filing, specifically concerning internal controls, which aligns best with the 'Audit Report / Information (AR)' category, as it is a standalone report on internal control assessment rather than a full Annual Report (10-K) or a simple earnings release (ER). The length (2365 chars) suggests it is the report itself, not just an announcement.
2025-06-25 Japanese
確認書
Audit Report / Information Classification · 95% confidence The document is extremely short (579 characters) and appears to be a confirmation or certification document related to a financial filing. Key Japanese terms include '【提出書類】確認書' (Filing Document: Confirmation Document), '【根拠条文】金融商品取引法' (Basis Article: Financial Instruments and Exchange Act), and confirmation by the CEO regarding the appropriateness of the '有価証券報告書' (Annual Securities Report) for the period ending March 31, 2025. This structure strongly suggests a certification accompanying a major filing, specifically confirming the accuracy of the Annual Securities Report (which corresponds to a 10-K in US terms, but in Japan, this confirmation is often filed separately or as part of the submission package). Since the document itself is a *confirmation* of the Annual Report's accuracy, and not the full report, it doesn't fit 10-K. It is not an earnings release (ER), interim report (IR), or a general announcement (RNS). Given the context of confirming the accuracy of the annual filing, it is most closely related to the overall annual reporting process. However, none of the provided codes perfectly match a 'Certification of Accuracy of Annual Report'. The closest related document type that covers comprehensive annual performance is the 10-K. Since this is a formal certification required by law regarding the annual filing, and it is not a general announcement (RPA/RNS) but a specific regulatory confirmation, I will classify it based on the subject matter it certifies. If this were a US filing, it would be part of the 10-K submission. Given the options, and recognizing this as a mandatory regulatory confirmation tied to the annual filing cycle, it is best categorized as related to the Annual Report (10-K) or potentially a Regulatory Filing (RNS) if it were a standalone, non-standard document. Because it explicitly references the '有価証券報告書' (Annual Securities Report), 10-K is the most relevant category for the underlying subject matter being certified, despite this document being the certification itself. Given the strict definitions, and the document being a formal regulatory confirmation, RNS (Regulatory Filings) is a safer fallback if 10-K is reserved strictly for the full report text. However, in many contexts, these certifications are filed alongside the 10-K. Given the high specificity of the other codes, and the document's nature as a formal regulatory submission confirming the annual filing, I will lean towards RNS as the most appropriate catch-all for specific regulatory confirmations not explicitly defined, although it is highly related to the 10-K cycle. FY 2025
2025-06-25 Japanese

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