確認メモ（原文・英語）Consolidated Financial Results for the Three Months Ended June 30, 2026, dated 10 August 2026 like the Japanese 第1四半期決算短信 and listed in English IR News that day: 9 pages against the Japanese 10, with the qualitative information, the statements and the notes (single segment, so sales by device type in place of segment results). The half-year (Six Months Ended September 30, 2025) is 12 pages against 12. Every period back to 2021 is in the English Financial Results list. Complete and on the Japanese cycle.
確認メモ（原文・英語）The latest English tanshin, Consolidated Financial Results for the Three Months Ended June 30, 2026 (10 Aug 2026), is 9 pages against the Japanese 10. Its contents match: outline of results (with sales by device type in place of segment results), financial position, the forecast explanation, the quarterly balance sheet and income/comprehensive income statements, and the notes (going concern, shareholders' equity, cash-flow note, segment note). The FY March 2026 English tanshin (13 May 2026) is 24 pages against the Japanese 23. It matches section for section: outline of results, financial position, cash flows, prospects, accounting-standards stance, the four statements, notes (basis of preparation, segment and related information, per share, subsequent events), and production/orders/sales. A whole translation.
確認メモ（原文・英語）The Q1 FY2026 English tanshin (10 Aug 2026) carries the quarterly balance sheet, the income and comprehensive income statements, and the same notes as the Japanese. Neither language has a Q1 cash-flow statement; both have the cash-flow note instead. The FY March 2026 English tanshin (13 May 2026) has all four statements, with the notes on basis of preparation, segments and related information (sales by product and region), per-share data and subsequent events. Full statements and notes for the latest period.
確認メモ（原文・英語）The English IR menu (Financial Results, Briefing, Integrated Report, Other Timely Disclosure Documents, Stock Overview, Shareholders' Meeting) carries no securities report; the Japanese side has a 有価証券報告書 page with no English counterpart, and the English governance page mentions the Securities Report without linking one. No yuho in English under any name.
確認メモ（原文・英語）Riken Keiki is a single-segment company, and the English says so. Every tanshin states 'As the Group engages in a single segment of the manufacture and sale of various types of industrial measurement devices ... the disclosure of business segment information has been omitted.' In its place, every quarter's English tanshin gives sales by device type. Q1 FY2026: fixed ¥9,088m (+3.6%), portable ¥5,743m (+28.0%), other ¥371m. FY2025: fixed ¥33,616m, portable ¥20,238m, other ¥1,356m. The year-end note adds sales by product and by region. Every English deck adds orders by device type, overseas sales by region, and sales by customer industry, the last with the regional method change flagged (from Q4 FY2025). Scored on the device-type lines, which are stated and consistent every period.
確認メモ（原文・英語）No Excel or CSV file on the English IR site. We checked the IR top, IR News (6 pages), Financial Results, Financial Results Briefing, Mid-Term Management Plan, Integrated Report, Other Timely Disclosure Documents, Stock Overview, Stock Price (a link to Yahoo Finance), IR Calendar and Shareholders' Meeting for xls/csv/zip/excel links. There are none. Multi-year figures exist only as PDF charts: 7 years of sales, OP, orders, region and industry mix in the decks, and five years of cash-flow indicators in the tanshin. The Japanese IR top has a ZIP 'IR資料一括ダウンロード' of the latest PDFs, with no English counterpart; it is not a data file either.
確認メモ（原文・英語）The FY March 2026 English tanshin (13 May 2026, '(4) Prospects for the Future') and deck (p15) give the FY3/2027 forecast with the first half: sales ¥60.0bn, OP ¥12.7bn, ordinary ¥13.0bn, net ¥9.6bn, EPS ¥211.19, dividend ¥60. The basis is a market view. Semiconductor investment in advanced fields continues on generative-AI and data-centre demand, there is broad-based demand in North America, and the overseas semiconductor share is to be expanded with multi-point tape-type detectors. The temporary OP-margin decline is put down to investment in organisation and pricing strategy, and cost pass-through is noted. No FX assumption and no device-type or regional forecast is given. The Q1 tanshin (10 Aug 2026) says the forecast is unchanged, and there were no revisions in the year. Forecast with part of the basis (market view only).
確認メモ（原文・英語）English results for the three months to 30 June 2026 published 10 August 2026, the same period and day as the Japanese first-quarter tanshin.
確認メモ（原文・英語）The English Medium-Term Management Plan from FY2026 to FY2028 (23 pages, the same as the Japanese 中期経営計画 2027年3月期～2029年3月期 at 23 pages) is complete. It reviews the previous plan, then covers the business environment, strategic direction, business strategy and financial strategy. Targets: FY2028 sales ¥70.0bn, OP ¥14.0bn or more, OP margin 20% or more, with an annual path (¥60.0/65.0/70.0bn sales; ¥12.7/13.3/14.0bn OP), ROE 10% or more against a 7% cost of equity, payout over 30%, DOE about 3%, total return about 40% (about ¥14.0bn cumulative), buybacks up to about ¥5.0bn, overseas sales ratio target 50%, and a three-year cash allocation (operating CF ¥32.0bn or more). The English IR News lists it on 13 May 2026, the Japanese TDnet date. Caveat: both the English and the Japanese website PDFs were created 18 May (the English modified 22 May), so on the listing-date rule this is same day. As complete as the Japanese, current.
確認メモ（原文・英語）The English Financial Results Briefing page mirrors the Japanese 決算説明関連 page item for item: decks for Q1 FY2026 (August 2026, 13 pages), the FY2025 full year (May 2026, 16 pages), Q3 and the half year, plus the English Q&A Summary of the May 2026 results and medium-term plan briefing (7 pages) and an English briefing video. The Japanese side publishes no deck for periods the English lacks. Every period, with the supplement.
確認メモの要点（当調査による日本語要約）英語のIRメニューに投資家向けの専用ページ「Reason for Riken's Growth」があり、国内半導体工場のガス検知器シェア約70%、売上の約40%が半導体向けなどで強みを数値化しているため5点です。
確認メモ（原文・英語）The English IR menu has a dedicated 'Reason for Riken's Growth' page framed for investors in three parts: What does RIKEN KEIKI do? / What are the strengths? / What is it aiming for? The strengths are quantified: about 70% share of gas detectors in Japanese semiconductor fabs, about 40% of sales to the semiconductor industry, in-house sensor development (Kasukabe R&D and production centres, 2015/2020), and a stable maintenance business. It adds consolidated sales of ¥55.2bn and an overseas ratio of 47.3% in FY March 2026, and links to the decks, the plan and the integrated report. A dedicated page with quantified strengths.
確認メモ（原文・英語）The drivers are named across the English plan, deck and Reason page. Semiconductors are the priority market, on AI and data centres, and shipping is the second (the plan's market-attractiveness table). The overseas push targets a 50% overseas sales ratio (47.3% now), focused on East Asia and North America with multi-point tape-type detectors and the FPM-80A. Maintenance services are expected to restore margin, and methanation and decarbonisation are named as a new field. Some are quantified: a 70% domestic semiconductor share, about 40% of sales to semiconductors, maintenance at 42.1% of non-consolidated sales, regional and industry sales histories, and the ¥70bn target. There is no market size or capacity figure, and no contribution of each driver to the target. Named, some quantified.
確認メモ（原文・英語）Only one briefing has a Q&A in either language: the 14 May 2026 results and new medium-term plan web briefing. The English 'Q&A Summary from Web Financial Results and New Medium-Term Management Plan Briefing' (7 pp) matches the Japanese 質疑応答要旨 (7 pp). Neither page dates the item, and the English IR News does not list it separately. On PDF creation dates the English is 1 Jun 2026 against the Japanese 27 May 2026, about five days later. Other briefings (Q1, H1, Q3) have no Q&A in either language; there are English and Japanese briefing videos for the full year. Every Q&A the Japanese publishes, but a few days late.
確認メモ（原文・英語）Latest English edition is Integrated Report 2025, 46 pages (file dated 28 October 2025), which states it covers the fiscal year ended March 31, 2025 - same page count as the Japanese 2025 edition. The Japanese side already offers 統合報告書 2026 (56 pages, PDF created 1 October 2026, judged from the PDF creation date). Complete report, one edition behind.
確認メモ（原文・英語）The new English plan opens with a dated review of the FY2023-FY2025 plan (pp2-4), target against actual. Sales: target ¥50.0bn or more, result ¥55.2bn. OP: target ¥12.0bn or more, result ¥12.4bn. ROE: double digits kept every year (12.3/10.7/12.2%). Dividend: increased every year (¥40/45/55). A year-by-year chart sets the plan's sales path (¥46.4/48.0/50.0bn) against results. Variances are explained: sales above plan, OP met on volume and price increases since 2H FY2025, and the margin trending down on raw-material costs. Previous plan's targets against actuals, explained.
確認メモ（原文・英語）The Corporate Governance Report filed with the TSE, in English, 14 pages, 'Last updated: June 25, 2026', announced in English IR News the same day and linked from the English Corporate governance page. Current.
確認メモ（原文・英語）Integrated Report 2025 (English, pp30-31, 'Board of Directors as of July 1, 2025') gives every director a profile: date of birth, career summary, attendance, shares owned and 'Tenure as director'. That covers Matsumoto 16 years, Kobu 8, Kizaki 6, Nakano 14, Taga 6, Uematsu 4 and Takemoto newly elected, plus Chairman Kobayashi (22), who has since left. The June 2026 English AGM notice updates the three executive candidates with full careers, tenure (17/9/7 years) and reasons for nomination. The English Corporate Governance Report (25 Jun 2026) marks Taga, Uematsu and Takemoto as independent, with reasons for designation and expertise (corporate management, law, finance). The English Executive Team page flags the outside directors. Every current director has tenure, career and independence in English.
確認メモ（原文・英語）The English Notice of the 120th AGM (29 May 2026, p7) has a skills matrix for all seven directors of the post-AGM board: Matsumoto, Kobu, Kizaki, Nakano, Taga, Uematsu and Takemoto. It covers ten skills: corporate management, international business, sales/marketing, technology/R&D, production, corporate governance, finance/accounting, IT/digital, human resources and strategy/sustainability. Integrated Report 2025 has the previous year's matrix. The current matrix in English.
確認メモ（原文・英語）Integrated Report 2025 (English, p28) sets out the structure: fixed, performance-linked, and restricted stock for executive directors; fixed only for Audit and Supervisory Committee members. The KPI is consolidated operating profit, explained as an MTP target, with the target ¥11,600m against the actual ¥11,476m used. Amounts are given by type: executive directors ¥176.0m (fixed 87.1, performance-linked 67.4, restricted stock 21.6, 4 people), inside ASC member ¥22.4m, outside directors ¥15.1m. The pay mix rule is stated: there is no fixed ratio, but the performance-linked and stock share rises with position. The English CG Report (25 Jun 2026) repeats the structure and adds the cap: performance-linked pay at most 3% of consolidated operating income. The amounts are for the prior year. Structure, KPI and amounts by type.
確認メモ（原文・英語）Notice of the 120th Annual General Meeting of Shareholders in English, listed on 29 May 2026 (file created 26 May) for a meeting on 25 June - 27 days - 7 pages with the Reference Documents for the single proposal (election of three directors) with each candidate's career and reasons for nomination. It tells the reader to vote in writing or via the internet by 5:10 p.m. on 24 June; no Japanese-only label on the voting route (the '(in Japanese)' tags attach to the materials-posting websites). Re-checked 23 Oct 2026 (G5 voting-site sweep, after the independent audit): the company's shareholder pages name Mizuho Trust & Banking as share registrar, whose voting website (soukai.mizuho-tb.co.jp) is in Japanese only, with no English option, as for ESPEC (6859) and Nitto Boseki (3110). Every proposal in English, but a Japanese-only voting route, so 4.
確認メモ（原文・英語）The English Shareholders' Meeting page lists the 116th to 120th notices only, and English IR News and Other Timely Disclosure Documents carry no resolutions or voting results. The Japanese side posted 臨時報告書(議決権行使結果) and 第120回定時株主総会決議ご通知 on 25-26 June 2026; no English counterpart.
確認メモ（原文・英語）The only English treatment is the Corporate Governance Report (25 Jun 2026), Principle 1-4. Shares are held where there is a reasonable business reason and profitability (dividend yield, sound issuer), and are considered for sale otherwise. The Board verified the individual stocks in May 2026, and voting is examined on earnings, payout and ROE. We found no count, no amount, no per-stock list and no reduction target in English: not in the CG Report, Integrated Report 2025, the plan, or the cost-of-capital notice (Aug 2025). The yuho, which carries the holdings table, is Japanese only. Governance-report policy only.
確認メモ（原文・英語）The English homepage header has a visible 'IR' link straight to https://www.rikenkeiki.co.jp/english/ir (the hover dropdown is optional). The homepage IR block and footer also link there. One click.
確認メモ（原文・英語）We sampled 25 English document links across types and years, and all are English. Tanshin: Q1 FY26, FY25, Q3 FY25, H1 FY25, H1 FY2021, H1 FY2022 (/pdf/ir/ path). Decks: Q1 FY26, FY25, Q3 FY25, FY2022. Q&A Summary May 2026. Medium-term plans 2026-28 and 2023-25. Integrated reports 2025 and 2023. AGM notices 120th and 116th, and the 119th correction. Corporate Governance Report. Notices: dividend 13 May 2026, buyback 17 Dec 2025, organisational changes 2 Mar 2026 and 22 Sep 2025, RS completion 21 Jul 2026, cost-of-capital update Aug 2025. Only stray CJK in metadata or titles. All English.
確認メモ（原文・英語）The same sample of 25 links (see O2), from 2021 to Aug 2026, all opened in the rendered browser as PDFs with text. None was dead. The IR-top 'Integrated Report' banner points to the President Message page rather than the report (a mislink, not dead), and the briefing videos are on net-presentations.com. All live.
確認メモ（原文・英語）These English IR pages all rendered their content in the browser: IR top (latest five IR News), IR News (6 pages), Financial Results, Financial Results Briefing, Mid-Term Management Plan, Reason for Riken's Growth, Integrated Report, Other Timely Disclosure Documents, Stock Overview, Shareholders' Meeting, President Message and Corporate governance. The IR Calendar text is empty, but the screenshot shows the calendar is an image that renders (Q1-Q4 with the earnings and AGM months). Stock Price is a link out to Yahoo Finance. No empty lists or failed widgets. Every page renders.
確認メモ（原文・英語）English IR News is one dated list across all document types: tanshin, decks, the briefing video, AGM notice, CG Report updates, the plan, timely notices and the integrated report. It runs from 2026/08/10 back over 6 pages. Items carry no type label, though the site news list tags them 'ir'. Typed pages also exist separately (Financial Results, Briefing, Shareholders' Meeting, Other Timely Disclosure, Integrated Report, plan). One dated all-types list, untyped.
確認メモ（原文・英語）The archive has several years across types: tanshin from H1 FY2021 (Sept 2021) to Q1 FY2026, decks from FY2022, AGM notices from the 116th (2022) to the 120th, integrated reports 2023-2025, both medium-term plans, timely notices back to 2025 on the Other page, and IR News 6 pages deep. Several years across document types.
確認メモの要点（当調査による日本語要約）英語IRトップの「Contact Us (IR)」からIR専用の英語の問い合わせフォームに移動できます。専用で分かりやすいため4点です。
確認メモ（原文・英語）The English IR top page links 'Contact Us (IR)' to 'Inquiries Concerning IR', a dedicated IR inquiry form in English (the intro line still reads placeholder 'sample text'). The tanshin names Takuro Maeda, General Manager, Accounting Department, +81-3-3966-1128. Dedicated and immediately obvious.
確認メモ（原文・英語）English IR News and the Japanese 決算短信 page give these listing dates. Q1 FY2026: tanshin EN 10 Aug 2026 against JA 10 Aug; deck EN 10 Aug (PDF created 10 Aug; tanshin PDF created 5 Aug). FY March 2026: tanshin and deck EN 13 May 2026 against JA 13 May (EN tanshin and deck PDFs created 13 May). Earlier periods are also same day: Q3 10 Feb 2026 and H1 11 Nov 2025, tanshin and deck; Q1 FY2025 tanshin 7 Aug 2025, with no deck that quarter in either language. Tanshin and deck the same day every period read.
確認メモ（原文・英語）Per-document lags, on listing dates: Q1 FY26 tanshin EN 10 Aug vs JA 10 Aug 2026 = 0. FY March 2026 tanshin 13 May vs 13 May = 0. AGM notice EN 29 May (file created 26 May) vs JA 29 May 2026 = 0. Corporate Governance Report EN 25 Jun 2026 (Notice of Update, file created 25 Jun) vs JA 最終更新日 25 Jun 2026 = 0. Annual securities report: no English (JA 2026年3月期 有価証券報告書 filed June 2026), counted as >90. Median 0 days.
確認メモ（原文・英語）The Japanese その他適時開示資料 list for 16 Oct 2025-16 Oct 2026 has 10 disclosures: buyback 17 Dec and result 18 Dec 2025; buyback 16 Feb and result 17 Feb; organisational and personnel changes 2 Mar; internal-control policy 13 Mar; dividend increase 13 May; new medium-term plan 13 May; RS disposal 25 Jun; RS payment completion 21 Jul 2026. There are also four tanshin (11 Nov, 10 Feb, 13 May, 10 Aug), and no forecast revisions in the period. English IR News and Other Timely Disclosure list every one on the same date. Spot-checked PDFs were created on the day: 17 Dec, 2 Mar, 21 Jul, dividend 12-13 May. Caveat: the 13 May plan item links to the plan page, whose English PDF (like the Japanese site copy) was created 18 May; the Japanese TDnet version is dated 13 May. Scored on listing dates. All, same day.
確認メモ（原文・英語）No machine-translation notice on the rendered English pages: there is no banner, pop-up or translate widget. The English Site Policy has only a general accuracy disclaimer, with no mention of machine translation. The documents carry only the human-translation precedence line ('translated from the Japanese original for reference purposes only ... the original shall prevail'), which belongs to R5. Nothing presented as machine-translated.
確認メモ（原文・英語）The tanshin, the results-briefing decks, the AGM notice and the Corporate Governance Report each say 'the original shall prevail'. The Integrated Report 2025 and the Q&A Summary carry no such statement. Disclaimed on some documents.
Semiconductor gas-detection growth and completed-plan review
Riken Keiki completed its three-year plan and subsequently disclosed final sales, profit, ROE and dividend outcomes.
時系列と出典（1件・内容は原文）
2023-06-01Plan or update announced Riken Keiki completed its three-year plan and subsequently disclosed final sales, profit, ROE and dividend outcomes.出典資料1
経営陣が表明したこと
Management committed to at least ¥50bn sales and at least ¥12bn operating profit by FY2026.
Investor question: How much of the outperformance is recurring, and what capital earned it? IR preparation: bridge segment growth, invested capital, margins and ROIC.
当調査の分析（会社の説明ではありません）
約束は具体的か4／5Sales and operating-profit targets were quantified, but capital-efficiency and allocation targets were limited.
実行の経過を追えるか5／5Final results were disclosed with business and geographic drivers.
経済性を説明しているか3／5The operating rationale was clear, while ROIC, project hurdles and optimal-capital guardrails were absent.
目標に対する結果を報告しているか5／5FY2026 sales and operating profit exceeded the disclosed plan thresholds.
Riken Keiki exceeded its FY2026 sales and operating-profit targets as semiconductor, construction, maintenance and overseas demand expanded.
資本構成
The balance sheet remained highly equity funded and dividends increased, but the completed plan did not publish an explicit optimal-capital or leverage range.
資本政策の意思決定
Management disclosed plan targets and final actuals, yet the plan lacked quantified ROIC, capital allocation and project hurdle rates.