Idemitsu Kosan CoIDKOF 68 ROC (Joel Greenblatt) % is 26.84% as of Mar. 2026, which is 133% above its 10-year median of 11.53. GuruFocus rates IDKOF with a GF Score™ of 68/100 and a GF Value™ of $6.71 (Modestly Overvalued). The stock has 4 warning signs investors should review. Among 999 Oil & Gas companies, Idemitsu Kosan Co ranks better than 56.36% on this metric.
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits). He defines ROC (Joel Greenblatt) % as EBIT divided by the total of Property, Plant and Equipment and net working capital. Idemitsu Kosan Co's annualized ROC (Joel Greenblatt) % for the quarter that ended in Mar. 2026 was 26.84%.
The historical rank and industry rank for Idemitsu Kosan Co's ROC (Joel Greenblatt) % or its related term are showing as below:
IDKOF'
s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: -0.26 Med: 11.53 Max: 21.15
Current: 10.56
During the past 13 years, Idemitsu Kosan Co's highest ROC (Joel Greenblatt) % was 21.15%. The lowest was -0.26%. And the median was 11.53%.
IDKOF's ROC (Joel Greenblatt) % is ranked better than 56.36% of 999
companies
in the Oil & Gas industry
Industry Median: 8.41
vs IDKOF: 10.56
Idemitsu Kosan Co's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 4.80% per year.
Idemitsu Kosan Co (OTCPK:IDKOF) ROC (Joel Greenblatt) % Explanation
The way Joel Greenblatt defines Return on Capital is a more accurate measure of how efficiently the company generates returns onthe capital actually invested in the business. EBIT is used instead of net income because the tax and interest payment may be affected by factors other than the core business operation. Intangible assets are not included in the calculation because they don't need to be replaced.
Idemitsu Kosan Co ROC (Joel Greenblatt) % Related Terms
Idemitsu Kosan Co ROC (Joel Greenblatt) % Historical Data
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The historical data trend for Idemitsu Kosan Co's ROC (Joel Greenblatt) % can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
IDKOF vs VLO, MPC, PSX: ROC (Joel Greenblatt) % Comparison
For the Oil & Gas Refining & Marketing subindustry, Idemitsu Kosan Co's ROC (Joel Greenblatt) %, along with its competitors' market caps and ROC (Joel Greenblatt) % data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Idemitsu Kosan Co ROC (Joel Greenblatt) % vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Idemitsu Kosan Co's ROC (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where Idemitsu Kosan Co's ROC (Joel Greenblatt) % falls into.
Idemitsu Kosan Co ROC (Joel Greenblatt) % Calculation
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits) . He defines Return on Capital as follows:
EBIT stands for Earnings Before Interest and Taxes.
Fixed Assets are also known as non-current assets. They include the Property, Plant and Equipment that the firm needs in its operation.
GuruFocus calculates net working capital as: (Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Deferred Revenue + Other Current Liabilities). We're trying to account for OPERATING assets and liabilities (part of daily business) when calculating working capital. Cash and marketable securities are considered NON-OPERATING assets and are not included in calculation. We will also back out all interest bearing debt, short term debt and the portion of long term debt that is due in the current period from the current liabilities. This debt will be considered when computing cost of capital and it would be inappropriate to count it twice.
Note:
The EBIT data used here is four times the quarterly (Mar. 2026) EBIT data.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
What does a ROC (Joel Greenblatt) % of 26.84% mean?
Idemitsu Kosan Co (IDKOF) has a ROC (Joel Greenblatt) % of 26.84% as of Mar. 2026. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Idemitsu Kosan Co and its competitors. This is 133% above median its historical median of 11.53. According to the industry distribution chart, Idemitsu Kosan Co ranks #436 out of 999 companies in the Oil & Gas industry, placing it in the top 43.6%.
Is Idemitsu Kosan Co's ROC (Joel Greenblatt) % too high?
Idemitsu Kosan Co's current ROC (Joel Greenblatt) % of 26.84% is 133% above median its 10-year median of 11.53. The Oil & Gas industry median ROC (Joel Greenblatt) % is 8.41. Idemitsu Kosan Co's value of 26.84% is 219.1% above this industry median. Based on the distribution chart, Idemitsu Kosan Co ranks #436 out of 999 companies in the Oil & Gas industry, which is above the industry midpoint. Overall, Idemitsu Kosan Co has a GF Score™ of 68/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Idemitsu Kosan Co's ROC (Joel Greenblatt) % compare to VLO and MPC?
According to the Oil & Gas industry distribution chart, Idemitsu Kosan Co ranks #436 out of 999 companies for ROC (Joel Greenblatt) %. This puts Idemitsu Kosan Co in the upper half of its industry. The industry median ROC (Joel Greenblatt) % is 8.41. Idemitsu Kosan Co's value of 26.84% is 219.1% above this benchmark. While the company's 10-year median is 11.53 vs. the industry median of 8.41, Idemitsu Kosan Co has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good ROC (Joel Greenblatt) % for an Oil & Gas company?
The median ROC (Joel Greenblatt) % among Oil & Gas companies is 8.41, based on 999 companies in the industry. Companies in the top quartile (top 25%) have a ROC (Joel Greenblatt) % significantly above this median, while those in the bottom quartile fall well below. However, ROC (Joel Greenblatt) % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Idemitsu Kosan Co's current ROC (Joel Greenblatt) % of 26.84% is 219.1% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high ROC (Joel Greenblatt) % mean?
A high ROC (Joel Greenblatt) % can signal that a stock is expensive relative to its fundamentals. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Idemitsu Kosan Co and its competitors. For the Oil & Gas industry, the median ROC (Joel Greenblatt) % is 8.41 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Idemitsu Kosan Co's current ROC (Joel Greenblatt) % is 26.84%, which is 133% above median its own 10-year median of 11.53. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Idemitsu Kosan Co stock overvalued right now?
Based on GuruFocus' analysis, Idemitsu Kosan Co (IDKOF) is currently considered Modestly Overvalued. The stock's GF Value™ is $6.71, compared to a current price of $7.50 — trading 11.8% above its estimated fair value. The current ROC (Joel Greenblatt) % is 26.84%, which is 133% above median its 10-year median of 11.53 and 219.1% above the Oil & Gas industry median of 8.41. Idemitsu Kosan Co's overall GF Score™ is 68/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is ROC (Joel Greenblatt) % calculated?
ROC (Joel Greenblatt) % is calculated from a company's financial statements. For Idemitsu Kosan Co (IDKOF), the current ROC (Joel Greenblatt) % is 26.84% as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Idemitsu Kosan Co (IDKOF) Overvalued in 2026?
Based on GuruFocus' analysis, Idemitsu Kosan Co stock appears to be overvalued.
The current stock price of $7.50 is trading 11.8% above its estimated GF Value™ of $6.71.
GuruFocus considers Idemitsu Kosan Co to be Modestly Overvalued.
Key valuation signals for IDKOF:
ROC (Joel Greenblatt) %: 26.84% (133% above median its 10-year median of 11.53)
GF Value™: $6.71 vs. price of $7.50 (11.8% above fair value)
Industry Position: 219.1% above the Oil & Gas median (#436 of 999)
No single metric tells the full story. See the IDKOF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Idemitsu Kosan Co Ltd engages in a variety of activities globally that include petroleum products, oil exploration and production, coal, and other businesses. The company operates through five segments. The Basic Chemicals segment makes and sells olefins and aroma products. Electricity/Renewable Energy covers thermal, solar, and wind power generation, electricity sales, and solar business. Fuel Oil handles production, trading, and import/export of refined petroleum. The Highly Functional Materials segment includes lubricants, chemicals, electronic materials, paving materials, and agri-bio. The Resource segment explores, develops, and sells crude oil, natural gas, and coal. Others cover insurance and intra-group services. It generates the majority of its revenue from the Fuel oil segment.
68GF Score
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