6823
RION CO.,LTD.
リオン株式会社
Electric Appliances
Rion Co., Ltd. develops, manufactures, sells, and services particle counters, medical equipment, and environmental equipment in Japan. The company's audiological equipment includes hearing instruments, such as analog and digital BTE, trimmer digital BTE, in-the-ear ready and custom-made, and analog body aid instruments, as well as wireless and waterproof hearing instruments; and medical equipment comprising audiometers and OAE screeners. Its sound and vibration measuring instruments include sound level meters, vibration meters, seismometers, frequency analyzers, microphones and recorders, and other products. The company's particle counters comprise air and liquid-borne particle counters, and viable particle counters. Its products are primarily used in the applications of environment-related administration, electronics, semiconductors, pharmaceutical, and food manufacturing industries. The company was formerly known as Kobayashi-Riken Seisakusho Ltd. and changed its name to Rion Co., Ltd. in 1960. Rion Co., Ltd. was incorporated in 1944 and is headquartered in Kokubunji, Japan.
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Overview
Filings & Signals
Ownership
Financials
▾ Collapse Charts
Income Statement
Balance Sheet
Cash Flow
Ratios & Per Share
Metric
FY 2025
TDnet
FY 2024
EDINET ↗
FY 2023
EDINET ↗
FY 2022
EDINET ↗
FY 2021
EDINET ↗
Net Sales
¥28.5B
¥27.9B
¥25.7B
¥23.9B
¥22.6B
Cost of Sales
¥14.4B
¥13.8B
¥12.7B
¥12.2B
¥11.3B
Gross Profit
¥14.1B
¥14.1B
¥13.0B
¥11.7B
¥11.4B
SG&A
¥9.7B
¥10.0B
¥9.6B
¥8.9B
¥8.3B
Operating Income
¥4.4B
¥4.0B
¥3.5B
¥2.8B
¥3.1B
Non-Operating Income
¥138M
¥126M
¥171M
¥206M
¥146M
Dividend Income
—
¥31M
¥35M
¥23M
¥18M
Interest Income
—
¥13M
¥11M
¥5M
¥4M
Non-Operating Expenses
—
¥54M
¥83M
¥42M
¥39M
Interest Expense
—
¥2M
¥2M
¥2M
¥2M
Ordinary Income
¥4.4B
¥4.1B
¥3.6B
¥3.0B
¥3.2B
Pre-tax Income
¥4.4B
¥3.9B
¥3.5B
¥2.4B
¥3.2B
Income Taxes
¥1.0B
¥1.0B
¥865M
¥585M
¥942M
Current Tax
—
¥1.1B
¥869M
¥762M
¥1.1B
Deferred Tax
—
¥-45M
¥-4M
¥-177M
¥-141M
Net Income (owners)
¥3.3B
¥2.9B
¥2.7B
¥1.8B
¥2.2B
Comprehensive Income
—
¥2.9B
¥3.1B
¥1.9B
¥2.1B
EBITDA
¥5.7B
¥5.3B
¥4.4B
¥3.6B
¥3.8B
Goodwill Amort. (J-GAAP)
—
¥68M
¥65M
¥28M
¥10M
EPS
¥271.41
¥232.19
¥215.51
¥146.33
¥181.41
Shares Outstanding
—
12.3M
12.3M
12.3M
12.3M
Shares Issued (total)
—
12.3M
12.3M
12.3M
12.3M
Treasury Shares
—
0.0M
0.0M
0.0M
0.0M
Metric
FY 2025
TDnet
FY 2024
EDINET ↗
FY 2023
EDINET ↗
FY 2022
EDINET ↗
FY 2021
EDINET ↗
Total Assets
¥41.8B
¥39.1B
¥37.1B
¥34.6B
¥33.2B
Current Assets
¥25.1B
¥22.7B
¥20.8B
¥19.5B
¥20.3B
Cash & Deposits
¥8.6B
¥6.0B
¥5.0B
¥5.4B
¥7.7B
Non-Current Assets
¥16.7B
¥16.4B
¥16.3B
¥15.1B
¥12.8B
PP&E
¥11.4B
¥11.8B
¥11.5B
¥10.2B
¥9.4B
Goodwill
—
¥728M
¥794M
¥830M
—
Intangible Assets
—
¥2.2B
¥2.5B
¥2.3B
¥1.0B
Investment Securities
¥1.5B
¥1.2B
¥1.1B
¥1.2B
¥1.0B
Deferred Tax Assets
—
¥803M
¥845M
¥1.0B
¥936M
Total Liabilities
¥7.0B
¥7.7B
¥7.9B
¥7.9B
¥7.9B
Current Liabilities
¥4.6B
¥5.5B
¥5.4B
¥4.8B
¥4.6B
Accounts Payable
—
¥2.3B
¥2.5B
¥2.5B
¥2.0B
Taxes Payable
—
¥825M
¥398M
¥268M
¥805M
Non-Current Liabilities
¥2.4B
¥2.2B
¥2.6B
¥3.2B
¥3.3B
Pension Obligations
—
¥507M
¥804M
¥1.4B
¥1.6B
Deferred Tax Liab.
—
¥58M
¥60M
¥66M
—
Total Equity
¥34.8B
¥31.4B
¥29.2B
¥26.6B
¥25.3B
Capital Stock
—
¥2.1B
¥2.1B
¥2.0B
¥2.0B
Capital Surplus
—
¥2.5B
¥2.5B
¥2.5B
¥2.5B
Retained Earnings
¥24.9B
¥22.5B
¥20.4B
¥18.3B
¥17.1B
Treasury Stock
—
¥-11M
¥-11M
¥-11M
¥-11M
AOCI
—
¥4.3B
¥4.3B
¥3.8B
¥3.7B
Equity (owners)
¥29.5B
¥27.1B
¥24.9B
¥22.8B
¥21.5B
Net Cash ⓘ
¥8.6B
¥6.0B
¥5.0B
¥5.4B
¥7.7B
NCAV ⓘ
¥18.2B
¥15.0B
¥12.9B
¥11.6B
¥12.5B
NCAV/Share
—
¥1,217
¥1,046
¥939
¥1,014
BV/Share
—
¥2,199
¥2,024
¥1,854
¥1,753
Metric
FY 2025
TDnet
FY 2024
EDINET ↗
FY 2023
EDINET ↗
FY 2022
EDINET ↗
FY 2021
EDINET ↗
Operating CF
¥4.2B
¥3.4B
¥2.9B
¥1.8B
¥2.8B
Interest Paid
—
¥-2M
¥-2M
¥-2M
¥-2M
Interest Received
—
¥44M
¥45M
¥28M
¥22M
D&A
¥1.3B
¥1.2B
¥837M
¥716M
¥704M
Goodwill Amort.
—
¥68M
¥65M
¥28M
¥10M
Investing CF
¥-753M
¥-1.7B
¥-2.7B
¥-3.2B
¥-952M
CapEx
¥603M
¥1.3B
¥2.1B
¥1.3B
¥531M
Proceeds from Invest.
—
—
¥55M
¥61M
—
Financing CF
¥-955M
¥-749M
¥-566M
¥-577M
¥-542M
Dividends Paid
—
¥-739M
¥-554M
¥-566M
¥-529M
Free Cash Flow
¥3.6B
¥2.1B
¥726M
¥473M
¥2.3B
Net Change in Cash
—
¥988M
¥-346M
¥-2.0B
¥1.4B
Metric
FY 2025
TDnet
FY 2024
EDINET ↗
FY 2023
EDINET ↗
FY 2022
EDINET ↗
FY 2021
EDINET ↗
ROE
10.1%
9.4%
9.5%
6.9%
9.1%
ROA
8.3%
7.5%
7.4%
5.3%
6.7%
EPS
¥271.41
¥232.19
¥215.51
¥146.33
¥181.41
DPS
¥35.00
¥70.00
¥55.00
¥45.00
¥45.00
BPS
¥2,822.57
¥2,551.75
¥2,372.88
¥2,163.30
¥2,057.40
FCF/Share
—
¥174
¥59
¥38
¥188
NCAV/Share
—
¥1,217
¥1,046
¥939
¥1,014
Payout Ratio
12.9%
30.1%
25.5%
30.8%
24.8%
Event Timeline
S Shareholder
A Capital Signal
▾ Hide Chart
Large Shareholder Reports 9
Date Activist Stake Event Flag Demands Source
2026-05-12
Mizuho Bank, Ltd.
5.68%
-1.06%
change
Passive
—
2026-05-12
Sumitomo Mitsui DS Asset Management Company, Limited
3.97%
-1.18%
change
Passive
—
2025-10-07
Sumitomo Mitsui DS Asset Management Company, Limited
5.15%
+1.13%
initial_5pct
Passive
—
2025-07-07
Mizuho Bank, Ltd.
6.74%
-1.14%
change
Passive
—
2024-11-08
Sumitomo Mitsui DS Asset Management Company, Limited
4.02%
-1.06%
change
Passive
—
2024-06-21
Mizuho Bank, Ltd.
7.88%
+1.03%
change
Passive
—
2024-06-07
Sumitomo Mitsui DS Asset Management Company, Limited
5.08%
initial_5pct
Passive
—
2024-02-22
Mizuho Bank, Ltd.
6.85%
+1.41%
change
Passive
—
2024-02-07
Mizuho Bank, Ltd.
5.44%
initial_5pct
Passive
—
Top 10 Shareholders
Ownership DNA
Cross-Holdings Tracker 7
#
Shareholder
Shares (thou.)
% of Total
1
一般財団法人小林理学研究所
3,130
25.41%
2
Japan Master Trust Bank
日本マスタートラスト信託銀行株式会社(信託口)
1,337
10.86%
3
Japan Custody Bank
株式会社日本カストディ銀行(信託口)
940
7.63%
4
Business Partner Stock Ownership Plan
リオン取引先持株会
482
3.91%
5
Mizuho Bank
株式会社みずほ銀行
210
1.70%
6
JPモルガン証券株式会社
195
1.58%
7
Employee Stock Ownership Plan
リオン従業員持株会
164
1.34%
8
State Street Bank and Trust Company
STATE STREET BANK AND TRUST COMPANY 505103(常任代理人 株式会社みずほ銀行 決済営業部)
158
1.28%
9
NOMURA PB NOMINEES LIMITED OMNIBUS-MARGIN(CASHPB)(常任代理人 野村證券株式会社)
156
1.27%
10
Nippon Life Insurance
日本生命保険相互会社
150
1.22%
Domestic Nominees
18.5%
-1.1% vs 2024
Trust bank custodians — GPIF, pensions, investment trusts
Foreign Custodians
1.3%
+1.3% vs 2024
Sub-custodians for foreign asset managers
Direct / Strategic
36.4%
+0.1% vs 2024
Named entities with disclosed investment intent
Shareholder
Trend
2023
2024
2025
一般財団法人小林理学研究所
—
25.43%
25.41%
-0.02%
Japan Master Trust Bank
日本マスタートラスト信託銀行
9.06%
8.99%
10.86%
+1.87%
Japan Custody Bank
日本カストディ銀行
10.15%
10.64%
7.63%
-3.01%
Business Partner Stock Ownership Plan
リオン取引先持株会
3.66%
3.77%
3.91%
+0.14%
Mizuho Bank
みずほ銀行
1.71%
1.71%
1.70%
-0.01%
JPモルガン証券
NEW ENTRY
—
—
—
1.58%
NEW
Employee Stock Ownership Plan
リオン従業員持株会
1.55%
1.36%
1.34%
-0.02%
State Street
NEW ENTRY
—
—
—
1.28%
NEW
NOMURA PB NOMINEES LIMITED OMNIBUS-MARGIN(CASHPB)
NOMURA PB NOMINEES LIMITED OMNIBUS-MARGIN(CASHPB)
—
1.65%
1.27%
-0.38%
Nippon Life Insurance
日本生命保険
1.22%
1.22%
1.22%
Sumitomo Mitsui Banking Corporation
三井住友銀行
last seen 2024
Exited Top 10
1.22%
1.22%
—
住友生命保険
last seen 2023
Exited Top 10
1.45%
—
—
BNP PARIBAS LUXEMBOURG/2S/JASDEC SECURITIES/UCITS ASSETS
last seen 2023
Exited Top 10
1.25%
—
—
小林理学研究所
last seen 2023
Exited Top 10
25.45%
—
—
Concentration (HHI)
ⓘ
858
865
849
3 fiscal years · top-10 holders per year · >2,500 HHI = high concentration · entity-resolved
Portfolio Book Value
¥808M
-5% since 2023
Holdings
7
+1 new
1 exited
Trend
Stable
vs 2023
Held Company
FY2025
¥808M total
FY2023
¥852M total
Book Val ¥M
Shares
Book Val ¥M
Shares
nishikawa keisoku co.,ltd.
西川計測㈱
325
39,000
216
39,000
M
FUJI KYUKO CO., LTD.
富士急行㈱
168
75,000
329
75,000
M
YOKOWO CO.,LTD.
㈱ヨコオ
154
112,300
235
112,300
M
Mizuho Financial Group, Inc.
㈱みずほフィナンシャルグループ
104
25,626
48
25,626
M
Mitsubishi UFJ Financial Group, Inc.
㈱三菱UFJフィナンシャル・グループ
54
27,000
23
27,000
M
Sumitomo Mitsui Trust Group, Inc.
三井住友トラストグループ㈱
2
NEW
New
600
—
KYORITSU MAINTENANCE CO.,LTD.
㈱共立メンテナンス
—
—
三井住友トラスト・ホールディングス㈱
—
−100%
Exit
—
1
300
M
Portfolio total
808
852
Book value in ¥M · ↓ reduced · ↑ increased vs prior year · M = mutual holding