6834
SEIKOH GIKEN Co.,Ltd.
株式会社 精工技研
Electric Appliances
SEIKOH GIKEN Co., Ltd. engages in design, manufacture, and sale of optical components and lens, and radio over fiber products in Japan and internationally. It offers precision and optical disc molds; injection molded components and precise manufacturing technology products; and optical communication components, such as connectors, ferrules, adaptors, jumper cables, optical packaging parts, attenuators, and crimping tools, as well as uniboot connectors. The company also provides optical manufacturing equipment, interferometers, endface cleaners, and field use equipment; lens; isotropic optical e-field sensor heads/optical probe heads, and optical probes for malfunction noise; and X-ray CT scanners, as well as non-destructive testing services. SEIKOH GIKEN Co., Ltd. was incorporated in 1972 and is headquartered in Matsudo, 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
¥30.1B
¥20.0B
¥15.8B
¥16.3B
¥16.2B
Cost of Sales
¥16.0B
¥12.7B
¥11.2B
¥11.1B
¥11.1B
Gross Profit
¥14.1B
¥7.3B
¥4.6B
¥5.2B
¥5.1B
SG&A
¥6.3B
¥4.5B
¥3.5B
¥3.8B
¥3.6B
Operating Income
¥7.7B
¥2.8B
¥1.1B
¥1.4B
¥1.5B
Non-Operating Income
¥451M
¥180M
¥234M
¥244M
¥135M
Dividend Income
—
¥2M
¥1M
¥2M
¥1M
Interest Income
—
¥41M
¥29M
¥8M
¥12M
Non-Operating Expenses
—
¥18M
¥17M
¥29M
¥19M
Ordinary Income
¥8.1B
¥3.0B
¥1.3B
¥1.6B
¥1.6B
Pre-tax Income
¥8.2B
¥3.0B
¥1.2B
¥1.5B
¥1.6B
Income Taxes
¥2.0B
¥776M
¥414M
¥426M
¥468M
Current Tax
—
¥720M
¥391M
¥473M
¥499M
Deferred Tax
—
¥56M
¥23M
¥-47M
¥-32M
Net Income (owners)
¥6.2B
¥2.2B
¥761M
¥1.1B
¥1.2B
Minority Interest
—
¥17M
¥2M
¥8M
¥7M
Comprehensive Income
—
¥2.9B
¥1.2B
¥1.5B
¥1.7B
EBITDA
¥8.6B
¥3.8B
¥2.0B
¥2.6B
¥2.8B
Goodwill Amort. (J-GAAP)
—
¥83M
¥110M
¥313M
¥308M
EPS
¥695.65
¥245.34
¥83.42
¥118.64
¥126.05
Shares Outstanding
—
9.0M
9.2M
9.2M
9.2M
Shares Issued (total)
—
9.3M
9.3M
9.3M
9.3M
Treasury Shares
—
0.3M
0.1M
0.1M
0.1M
Metric
FY 2025
TDnet
FY 2024
EDINET ↗
FY 2023
EDINET ↗
FY 2022
EDINET ↗
FY 2021
EDINET ↗
Total Assets
¥41.7B
¥34.4B
¥32.2B
¥31.3B
¥30.3B
Current Assets
¥30.9B
¥24.0B
¥22.7B
¥21.8B
¥20.6B
Cash & Deposits
¥18.0B
¥14.1B
¥14.1B
¥13.4B
¥12.4B
Trade Receivables
—
¥5.1B
¥4.2B
¥3.6B
¥4.3B
Non-Current Assets
¥10.8B
¥10.3B
¥9.5B
¥9.6B
¥9.7B
PP&E
¥8.6B
¥8.1B
¥7.8B
¥8.2B
¥8.0B
Goodwill
—
¥485M
¥67M
¥164M
¥463M
Intangible Assets
—
¥502M
¥85M
¥205M
¥587M
Investment Securities
¥572M
¥504M
¥365M
¥76M
¥72M
Total Liabilities
¥7.7B
¥6.2B
¥5.0B
¥4.9B
¥4.8B
Current Liabilities
¥6.3B
¥4.8B
¥3.4B
¥3.3B
¥3.4B
Taxes Payable
—
¥571M
¥215M
¥220M
¥179M
Non-Current Liabilities
¥1.4B
¥1.5B
¥1.6B
¥1.6B
¥1.5B
Pension Obligations
—
¥1.0B
¥1.1B
¥1.0B
¥994M
Deferred Tax Liab.
—
¥78M
¥65M
¥51M
¥44M
Total Equity
¥34.0B
¥28.1B
¥27.2B
¥26.5B
¥25.5B
Capital Stock
—
¥6.8B
¥6.8B
¥6.8B
¥6.8B
Capital Surplus
—
¥10.6B
¥10.6B
¥10.6B
¥10.6B
Retained Earnings
¥15.8B
¥10.2B
¥8.8B
¥8.5B
¥7.9B
Treasury Stock
—
¥-1.8B
¥-539M
¥-539M
¥-556M
AOCI
—
¥2.2B
¥1.5B
¥1.1B
¥693M
Equity (owners)
¥31.5B
¥25.8B
¥25.6B
¥25.3B
¥24.7B
Minority Interests
—
¥151M
¥28M
¥29M
¥24M
Net Cash ⓘ
¥18.0B
¥14.1B
¥14.1B
¥13.4B
¥12.4B
NCAV ⓘ
¥23.2B
¥17.8B
¥17.7B
¥16.9B
¥15.8B
NCAV/Share
—
¥1,980
¥1,915
¥1,828
¥1,713
BV/Share
—
¥2,873
¥2,775
¥2,743
¥2,681
Metric
FY 2025
TDnet
FY 2024
EDINET ↗
FY 2023
EDINET ↗
FY 2022
EDINET ↗
FY 2021
EDINET ↗
Operating CF
¥5.5B
¥3.1B
¥1.8B
¥2.3B
¥1.9B
Interest Received
—
¥39M
¥25M
¥6M
¥16M
D&A
¥894M
¥870M
¥873M
¥939M
¥958M
Goodwill Amort.
—
¥83M
¥110M
¥313M
¥308M
Investing CF
¥-879M
¥1.0B
¥-1.5B
¥-950M
¥-2.3B
CapEx
¥962M
¥526M
¥496M
¥946M
¥1.6B
Purchase Investments
—
¥-1M
¥-268M
¥-1M
¥-2M
Proceeds from Invest.
—
—
¥2M
—
—
Financing CF
¥-712M
¥-2.0B
¥-508M
¥-513M
¥-429M
Dividends Paid
—
¥-785M
¥-462M
¥-461M
¥-369M
Share Buybacks
—
¥-1.3B
—
¥-0M
¥-0M
Free Cash Flow
¥4.5B
¥2.5B
¥1.3B
¥1.4B
¥250M
Net Change in Cash
—
¥2.3B
¥-128M
¥995M
¥-679M
Metric
FY 2025
TDnet
FY 2024
EDINET ↗
FY 2023
EDINET ↗
FY 2022
EDINET ↗
FY 2021
EDINET ↗
ROE
20.0%
8.1%
2.8%
4.2%
4.6%
ROA
16.3%
6.7%
2.4%
3.5%
3.8%
EPS
¥695.65
¥245.34
¥83.42
¥118.64
¥126.05
DPS
¥40.00
¥65.00
¥55.00
¥50.00
¥50.00
BPS
¥3,785.69
¥3,142.58
¥2,976.87
¥2,898.91
¥2,785.76
FCF/Share
—
¥283
¥141
¥147
¥27
NCAV/Share
—
¥1,980
¥1,915
¥1,828
¥1,713
Payout Ratio
5.8%
26.5%
65.9%
42.1%
39.7%
Event Timeline
S Shareholder
A Capital Signal
▾ Hide Chart
Large Shareholder Reports 28
Date Activist Stake Event Flag Demands Source
2025-12-23
Yumiko Tomaru
10.55%
-1.82%
correction
Passive
—
2025-12-23
Yumiko Tomaru
10.55%
-1.82%
correction
Passive
—
2025-12-23
Yumiko Tomaru
16.98%
+4.61%
correction
Passive
—
2025-12-23
Yumiko Tomaru
12.37%
correction
Passive
—
2025-12-23
Yumiko Tomaru
16.98%
+4.61%
correction
Passive
—
2025-10-09
Yumiko Tomaru
10.55%
correction
Passive
—
2025-10-09
Yumiko Tomaru
10.55%
change
Passive
—
2025-10-06
Nomura Securities Co.,Ltd.
6.65%
+1.09%
change
Passive
—
2025-09-09
Yumiko Tomaru
10.55%
initial_5pct
Passive
—
2025-02-07
Yumiko Tomaru
16.98%
+5.36%
change
Passive
—
2025-02-07
Yumiko Tomaru
12.37%
+0.75%
change
Passive
—
2025-02-07
Yumiko Tomaru
16.98%
+5.36%
change
Passive
—
2025-02-07
Yumiko Tomaru
11.62%
correction
Passive
—
2025-02-07
Yumiko Tomaru
11.62%
correction
Passive
—
2025-02-07
Yumiko Tomaru
10.55%
-1.07%
correction
Passive
—
2025-02-07
Yukiko Hosoe
16.99%
+6.1%
change
Passive
—
2025-02-07
Yukiko Hosoe
19.63%
+8.74%
initial_5pct
Passive
—
2025-02-07
Yukiko Hosoe
16.99%
+6.1%
change
Passive
—
2025-02-07
Yukiko Hosoe
16.66%
+5.77%
initial_5pct
Passive
—
2025-02-07
Yukiko Hosoe
14.31%
+3.42%
initial_5pct
Passive
—
2025-02-07
Yukiko Hosoe
9.28%
-1.61%
correction
Passive
—
2025-02-07
Yukiko Hosoe
10.89%
correction
Passive
—
2025-02-07
Yukiko Hosoe
10.89%
correction
Passive
—
2024-12-20
Yumiko Tomaru
10.55%
-1.07%
change
Passive
—
2024-12-20
Yukiko Hosoe
9.28%
-1.61%
change
Passive
—
2024-12-11
Yumiko Tomaru
11.62%
change
Passive
—
2024-12-11
Yukiko Hosoe
10.89%
change
Passive
—
2024-11-08
Nomura Securities Co.,Ltd.
5.56%
initial_5pct
Passive
—
Top 10 Shareholders
Ownership DNA
Cross-Holdings Tracker 4
#
Shareholder
Shares (thou.)
% of Total
1
上野 昌利
875,360
9.74%
2
有限会社 高志
654,400
7.28%
3
有限会社 光研
583,500
6.49%
4
木村 保
583,200
6.49%
5
上野 淳
349,900
3.89%
6
吉田 智恵
343,000
3.82%
7
管理信託(A034)受託者 株式会社SMBC信託銀行
330,500
3.68%
8
Custody Bank of Japan, Ltd. (Trust Account)
株式会社日本カストディ銀行 (信託口)
328,822
3.66%
9
野村信託銀行株式会社(投信口)
300,400
3.34%
10
管理信託(A033)受託者 株式会社SMBC信託銀行
282,500
3.14%
Domestic Nominees
3.7%
+3.7% vs 2024
Trust bank custodians — GPIF, pensions, investment trusts
Foreign Custodians
0.0%
+0.0% vs 2024
Sub-custodians for foreign asset managers
Direct / Strategic
47.9%
-2.9% vs 2024
Named entities with disclosed investment intent
Shareholder
Trend
2023
2024
2025
上野 昌利
9.21%
9.21%
9.74%
+0.53%
限会社 高志
7.08%
7.08%
7.28%
+0.20%
限会社 光研
6.31%
6.31%
6.49%
+0.18%
木村 保
6.31%
6.31%
6.49%
+0.18%
上野 淳
3.79%
3.79%
3.89%
+0.10%
吉田 智恵
—
3.71%
3.82%
+0.11%
管理信託(A034)受託者 株式会社SMBC信託銀行
4.66%
4.66%
3.68%
-0.98%
日本カストディ銀行
NEW ENTRY
—
—
—
3.66%
NEW
野村信託銀行株式会社(投信口)
NEW ENTRY
—
—
—
3.34%
NEW
管理信託(A033)受託者 株式会社SMBC信託銀行
4.68%
4.68%
3.14%
-1.54%
細江 直輝
last seen 2024
Exited Top 10
—
2.51%
—
細江 一稀
last seen 2024
Exited Top 10
—
2.51%
—
中村 未季
last seen 2023
Exited Top 10
4.20%
—
—
向山 沙希
last seen 2023
Exited Top 10
4.20%
—
—
日本マスタートラスト信託銀行
last seen 2023
Exited Top 10
4.97%
—
—
Concentration (HHI)
ⓘ
333
299
310
3 fiscal years · top-10 holders per year · >2,500 HHI = high concentration · entity-resolved
Portfolio Book Value
¥52M
+77% since 2023
Holdings
4
+1 new
1 exited
Trend
1 building
vs 2023
Held Company
FY2025
¥52M total
FY2023
¥29M total
Book Val ¥M
Shares
Book Val ¥M
Shares
Sumitomo Electric Industries, Ltd.
住友電気工業㈱
21
+8.3%
↑
8,514
13
7,862
The Chiba Bank, Ltd.
㈱千葉銀行
14
10,000
9
10,000
M
Mitsubishi UFJ Financial Group, Inc.
㈱三菱UFJフィナンシャル・グループ
12
NEW
New
5,970
—
M
Mizuho Financial Group, Inc.
㈱みずほフィナンシャルグループ
5
1,191
2
1,191
Mitsubishi UFJ Financial Group, Inc.
㈱三菱UFJフィナンシャル・グループ
—
−100%
Exit
—
5
5,970
M
Portfolio total
52
29
Book value in ¥M · ↓ reduced · ↑ increased vs prior year · M = mutual holding