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Idemitsu Kosan Co.,Ltd.

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Recent & upcoming events

Aug 7
Earnings 2:00
Q1 earnings announcement (scheduled)
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Jun 23
Shareholder meeting 21:00
Shareholders' meeting
Venue: - Details
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May 12
Earnings 2:00
FY earnings announcement (scheduled)
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Sep 27
Est.
Dividend Time TBD
Last day with rights (interim)
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Sep 28
Est.
Ex-dividend Time TBD
Ex-rights date (interim)
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Nov 11
Earnings 1:00 approx.
Q2 earnings announcement (scheduled)
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2027
Feb 10
Earnings 1:00 approx.
Q3 earnings announcement (scheduled)
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Mar 28
Est.
Dividend Time TBD
Last day with rights (year-end)
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Mar 29
Est.
Ex-dividend Time TBD
Ex-rights date (year-end)
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May 12
Est.
Earnings 2:00 approx.
Full-year earnings
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Aug 11
Est.
Earnings 2:00 approx.
Q1 earnings
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KPI highlights

FY26
Revenue ¥8.11T YoY -11.8%
Operating income ¥212.20B margin 2.6%
Net income ¥171.91B YoY +65.2%
EPS ¥140 YoY +80.4%
P/E —
ROE 9.4% Equity ratio 36% Typical equity ratios vary a lot by industry. Banks, brokerages, and other financial companies tend to run lower ratios because leverage (using other people's capital) is core to their business model — a low ratio there isn't a sign of financial weakness.

Company guidance

FY2027/03 Company-issued full-year guidance (from earnings report) / %=vs prior FY
Revenue — —
Operating income — —
Net income ¥75.00B -56.4%
EPS ¥62 -55.8%

Quarterly fundamentals

Income & cash flow
Quarter FY23 Q2FY23 Q3FY23 Q4FY24 Q1FY24 Q2FY25 Q2
Revenue ¥1.82T¥2.21T¥2.38T¥2.32T——
Operating income ¥44.87B¥158.05B¥90.78B¥52.62B——
Net income ¥44.87B¥119.11B¥73.84B¥-10.99B——
Operating CF ——————

Ownership over time

Share of total shares outstanding (disclosed major holdings + undisclosed)（2021–2026）

事業法人 13.9%国内機関 18.1%海外機関 10.8%その他 8.4%未開示 46.8%202120222023202420252026
事業法人国内機関海外機関個人その他未開示・浮動株

「国内機関」は信託銀行の名義口座（年金・パッシブ・一部海外資本を含む）を集計し、実質保有者へは分解していません。分類は開示名称からの推定です。

Top shareholders — rank & share

日本マスタートラスト信託銀行株式会社 12.2%日本マスタートラスト信託銀行株式会社（信託口）Aramco Overseas Co 9.5%Aramco Overseas Company B.V.（常任代理人　アンダーソン・毛利・友常法律事務所）日章興産株式会社 9%日章興産株式会社公益財団法人出光美術館 8.4%公益財団法人出光美術館株式会社日本カストディ銀行（信託口） 5.9%株式会社日本カストディ銀行（信託口）正和興産株式会社 2%正和興産株式会社出光興産社員持株会 2%出光興産社員持株会株式会社善 1.5%株式会社善株式会社縁 1.4%株式会社縁STATE STREET BANK 1.4%STATE STREET BANK AND TRUST COMPANY 505001（常任代理人　株式会社みずほ銀行）202120222023202420252026

Top shareholders — actual figures (as of 2026)

Holder Shares held Ratio Source
日本マスタートラスト信託銀行株式会社（信託口） 148,938,400 12.2% Yuho (EDINET)
Aramco Overseas Company B.V. 115,579,000 9.5% Yuho (EDINET)
日章興産株式会社 109,520,390 9.0% Yuho (EDINET)
公益財団法人出光美術館 101,962,000 8.4% Yuho (EDINET)
株式会社日本カストディ銀行（信託口） 72,561,000 5.9% Yuho (EDINET)
正和興産株式会社 24,872,000 2.0% Yuho (EDINET)
出光興産社員持株会 23,944,430 2.0% Yuho (EDINET)
株式会社善 17,807,169 1.5% Yuho (EDINET)
株式会社縁 17,591,841 1.4% Yuho (EDINET)
STATE STREET BANK AND TRUST COMPANY 505001 16,854,124 1.4% Yuho (EDINET)

Source：EDINET（大株主の状況）　Classification inferred from disclosed names

F-Score (Piotroski)

6/9

Checks financial health against 9 criteria and shows how many are met as a fraction (more ✓ marks is healthier). Items with no data are shown as “—” — they're simply excluded from judgment, not counted against the score.

✓ Positive ROA ROA 3.2%
✓ Positive operating cash flow ¥392.43B
✓ ROA improved YoY 2.2% → 3.2%
✓ Operating CF exceeds net income (accrual quality) OCF ¥392.43B / net income ¥171.91B
✗ Equity ratio improved* Substitute for the original “decrease in long-term debt” 36.0% → 36.0%
✗ Current ratio improved 1.26× → 1.26×
✓ No dilution (shares outstanding did not increase) 1,358,078,000 → 1,288,747,000
✓ Gross margin improved 7.5% → 9.3%
✗ Asset turnover improved 1.92× → 1.52×

This score is reference information based on our own financial metrics. It is NOT a credit rating issued by a credit rating agency under Article 66-27 of the Financial Instruments and Exchange Act, and is NOT investment advice or a recommendation. Make investment decisions at your own responsibility.

Fact checklist

FY26
Equity ratio 36.0%
Current ratio 1.3×
Years of positive operating CF 8 of last 10 yrs
Payout ratio 31%
Latest fiscal year result Profit (net income ¥171.91B)

Performance history

Last 10 years
0.0兆円2.4兆円4.7兆円7.1兆円9.5兆円 FY17FY18FY19FY20FY21FY22FY23FY24FY25FY26

Income & assets

Unit: ¥100M
Item FY17FY18FY19FY20FY21FY22FY23FY24FY25FY26
Revenue 31,90337,30744,25160,45945,56666,86894,56387,19291,90281,059
Operating income 1,3522,0131,793-38.61,4014,3452,8243,4631,6222,122
Ordinary income 1,4002,2631,691-1401,0844,5933,2153,8522,1482,296
Net income 8821,623815-2293492,7952,5362,2851,0411,719
Total assets 26,41629,20328,90338,86939,54446,01248,65450,12347,75653,288
Equity 6,1999,0598,78912,00612,15114,36516,29318,12517,37719,511

Indicators & cash flow

*Split-adjustedUnit: ¥100M
Item FY17FY18FY19FY20FY21FY22FY23FY24FY25FY26
EPS ¥110¥169¥80¥-15¥23¥188¥171¥161¥78¥140
ROE 16.3%22.3%9.5%—3.0%21.8%16.8%13.4%5.9%9.4%
Operating CF 5351,3681,510-3271,7051,461-3283,7744,7673,924
Investing CF -2,148-899-1,223-1,345-1,099-1,116701-658-1,185-2,916
Financing CF 1,361-519-2021,579-562-300-904-2,805-3,435-1,049
FCF -1,613469287-1,6726063453723,1163,5821,008

A “—” means data wasn't available for that period — it's not a display error or an unusual value.

Source: EDINET (Annual Securities Report) (fetched 2026-08-29) *Some metrics supplemented from additional sources

Sector positioning

Relative standing within the sector

IR disclosure history

Timely disclosures & annual reports
Is this information incorrect?

Data provided by Twelve Data