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Idemitsu Kosan CoIDKOF +2.00%68 Debt-to-Equity is 0.71 as of Mar. 2026, which is 28% below its 10-year median of 0.99. 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 796 Oil & Gas companies, Idemitsu Kosan Co ranks worse than 62.44% on this metric.
A high debt to equity ratio generally means that a company has been aggressive in financing its growth with debt. This can result in volatile earnings as a result of the additional interest expense.
The historical rank and industry rank for Idemitsu Kosan Co's Debt-to-Equity or its related term are showing as below:
IDKOF'
s Debt-to-Equity Range Over the Past 10 Years
Min: 0.7 Med: 0.99 Max: 1.8
Current: 0.71
During the past 13 years, the highest Debt-to-Equity Ratio of Idemitsu Kosan Co was 1.80. The lowest was 0.70. And the median was 0.99.
IDKOF's Debt-to-Equity is ranked worse than 62.44% of 796
companies
in the Oil & Gas industry
Industry Median: 0.465
vs IDKOF: 0.71
Idemitsu Kosan Co (OTCPK:IDKOF) Debt-to-Equity Explanation
Because a company can increase its ROE % by having more financial leverage, it is important to watch the leverage ratio when investing in high ROE % companies.
Idemitsu Kosan Co Debt-to-Equity Related Terms
Idemitsu Kosan Co Debt-to-Equity Historical Data
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The historical data trend for Idemitsu Kosan Co's Debt-to-Equity 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.
For the Oil & Gas Refining & Marketing subindustry, Idemitsu Kosan Co's Debt-to-Equity, along with its competitors' market caps and Debt-to-Equity 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 Debt-to-Equity vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Idemitsu Kosan Co's Debt-to-Equity distribution charts can be found below:
* The bar in red indicates where Idemitsu Kosan Co's Debt-to-Equity falls into.
* 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.
Idemitsu Kosan Co (IDKOF) has a Debt-to-Equity of 0.71 as of Mar. 2026. Debt-to-Equity ratio represents the ratio of total debt to total company equity. View historical data on Idemitsu Kosan Co and its competitors. This is 28% below median its historical median of 0.99. Over the past decade, Idemitsu Kosan Co's Debt-to-Equity has ranged from 0.70 to 1.80. According to the industry distribution chart, Idemitsu Kosan Co ranks #497 out of 796 companies in the Oil & Gas industry, placing it in the top 62.4%.
Is Idemitsu Kosan Co's Debt-to-Equity too high?
Idemitsu Kosan Co's current Debt-to-Equity of 0.71 is 28% below median its 10-year median of 0.99. Over the past 10 years, this metric has ranged from a low of 0.70 to a high of 1.80. The Oil & Gas industry median Debt-to-Equity is 0.47. Idemitsu Kosan Co's value of 0.71 is 52.7% above this industry median. Based on the distribution chart, Idemitsu Kosan Co ranks #497 out of 796 companies in the Oil & Gas industry, which is below 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 Debt-to-Equity compare to VLO and MPC?
According to the Oil & Gas industry distribution chart, Idemitsu Kosan Co ranks #497 out of 796 companies for Debt-to-Equity. This places Idemitsu Kosan Co in the lower half of its industry. The industry median Debt-to-Equity is 0.47. Idemitsu Kosan Co's value of 0.71 is 52.7% above this benchmark. Historically, Idemitsu Kosan Co's own Debt-to-Equity has ranged from 0.70 to 1.80 over the past decade. While the company's 10-year median is 0.99 vs. the industry median of 0.47, 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 Debt-to-Equity for an Oil & Gas company?
The median Debt-to-Equity among Oil & Gas companies is 0.47, based on 796 companies in the industry. Companies in the top quartile (top 25%) have a Debt-to-Equity significantly above this median, while those in the bottom quartile fall well below. However, Debt-to-Equity should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Idemitsu Kosan Co's current Debt-to-Equity of 0.71 is 52.7% 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 Debt-to-Equity mean?
A high Debt-to-Equity can signal that a stock is expensive relative to its fundamentals. Debt-to-Equity ratio represents the ratio of total debt to total company equity. View historical data on Idemitsu Kosan Co and its competitors. For the Oil & Gas industry, the median Debt-to-Equity is 0.47 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Idemitsu Kosan Co's current Debt-to-Equity is 0.71, which is 28% below median its own 10-year median of 0.99. 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 $7.65 — trading 14% above its estimated fair value. The current Debt-to-Equity is 0.71, which is 28% below median its 10-year median of 0.99 and 52.7% above the Oil & Gas industry median of 0.47. 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 Debt-to-Equity calculated?
Debt-to-Equity is calculated from a company's financial statements. For Idemitsu Kosan Co (IDKOF), the current Debt-to-Equity is 0.71 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 $7.65 is trading 14% above its estimated GF Value™ of $6.71.
GuruFocus considers Idemitsu Kosan Co to be Modestly Overvalued.
Key valuation signals for IDKOF:
Debt-to-Equity: 0.71 (28% below median its 10-year median of 0.99)
GF Value™: $6.71 vs. price of $7.65 (14% above fair value)
Industry Position: 52.7% above the Oil & Gas median (#497 of 796)
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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