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Nagaoka InternationalTSE:6239 -1.05%63 PB Ratio is 1.18 as of Jul. 15, 2026, which is 10% below its 10-year median of 1.31. GuruFocus rates TSE:6239 with a GF Score™ of 63/100 and a GF Value™ of 円889.34 (Significantly Overvalued). The stock has 1 warning sign investors should review. Among 926 Oil & Gas companies, Nagaoka International ranks better than 59.83% on this metric.
Nagaoka International Corp stock PB Ratio (=1.21) is close to 1-year low of 1.2.
The historical rank and industry rank for Nagaoka International's PB Ratio or its related term are showing as below:
TSE:6239'
s PB Ratio Range Over the Past 10 Years
Min: 0.59 Med: 1.31 Max: 4.08
Current: 1.18
During the past 12 years, Nagaoka International's highest PB Ratio was 4.08. The lowest was 0.59. And the median was 1.31.
TSE:6239's PB Ratio is ranked better than 59.83% of 926
companies
in the Oil & Gas industry
Industry Median: 1.45
vs TSE:6239: 1.18
During the past 12 months, Nagaoka International's average Book Value Per Share Growth Rate was 8.20% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 15.10% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 19.90% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was 11.00% per year.
During the past 12 years, the highest 3-Year average Book Value Per Share Growth Rate of Nagaoka International was 25.90% per year. The lowest was -23.70% per year. And the median was 17.60% per year.
Back to Basics: PB Ratio
Nagaoka International (TSE:6239) PB Ratio Explanation
The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.
Be Aware
Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.
* 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, Nagaoka International's PB Ratio, along with its competitors' market caps and PB Ratio 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.
Nagaoka International PB Ratio vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Nagaoka International's PB Ratio distribution charts can be found below:
* The bar in red indicates where Nagaoka International's PB Ratio falls into.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.
* 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.
It can also be calculated from the numbers for the whole company:
A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.
Nagaoka International (TSE:6239) has a PB Ratio of 1.18 as of Jul. 15, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Nagaoka International and its competitors. This is 10% below median its historical median of 1.31. Over the past decade, Nagaoka International's PB Ratio has ranged from 0.59 to 4.08. According to the industry distribution chart, Nagaoka International ranks #372 out of 926 companies in the Oil & Gas industry, placing it in the top 40.2%.
Is Nagaoka International's PB Ratio too high?
Nagaoka International's current PB Ratio of 1.18 is 10% below median its 10-year median of 1.31. Over the past 10 years, this metric has ranged from a low of 0.59 to a high of 4.08. The Oil & Gas industry median PB Ratio is 1.45. Nagaoka International's value of 1.18 is 18.6% below this industry median. Based on the distribution chart, Nagaoka International ranks #372 out of 926 companies in the Oil & Gas industry, which is above the industry midpoint. Overall, Nagaoka International has a GF Score™ of 63/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Nagaoka International's PB Ratio compare to VLO and MPC?
According to the Oil & Gas industry distribution chart, Nagaoka International ranks #372 out of 926 companies for PB Ratio. This puts Nagaoka International in the upper half of its industry. The industry median PB Ratio is 1.45. Nagaoka International's value of 1.18 is 18.6% below this benchmark. Historically, Nagaoka International's own PB Ratio has ranged from 0.59 to 4.08 over the past decade. While the company's 10-year median is 1.31 vs. the industry median of 1.45, Nagaoka International has consistently been below 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 PB Ratio for an Oil & Gas company?
The median PB Ratio among Oil & Gas companies is 1.45, based on 926 companies in the industry. Companies in the top quartile (top 25%) have a PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Nagaoka International's current PB Ratio of 1.18 is 18.6% below 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 PB Ratio mean?
A high PB Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Nagaoka International and its competitors. For the Oil & Gas industry, the median PB Ratio is 1.45 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Nagaoka International's current PB Ratio is 1.18, which is 10% below median its own 10-year median of 1.31. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Nagaoka International stock overvalued right now?
Based on GuruFocus' analysis, Nagaoka International (TSE:6239) is currently considered Significantly Overvalued. The stock's GF Value™ is 円889.34, compared to a current price of 円1,322.00 — trading 48.6% above its estimated fair value. The current PB Ratio is 1.18, which is 10% below median its 10-year median of 1.31 and 18.6% below the Oil & Gas industry median of 1.45. Nagaoka International's overall GF Score™ is 63/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PB Ratio calculated?
PB Ratio is calculated from a company's financial statements. For Nagaoka International (TSE:6239), the current PB Ratio is 1.18 as of Jul. 15, 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 Nagaoka International (TSE:6239) Overvalued in 2026?
Based on GuruFocus' analysis, Nagaoka International stock appears to be overvalued.
The current stock price of 円1,322.00 is trading 48.6% above its estimated GF Value™ of 円889.34.
GuruFocus considers Nagaoka International to be Significantly Overvalued.
Key valuation signals for TSE:6239:
PB Ratio: 1.18 (10% below median its 10-year median of 1.31)
GF Value™: 円889.34 vs. price of 円1,322.00 (48.6% above fair value)
Industry Position: 18.6% below the Oil & Gas median (#372 of 926)
No single metric tells the full story. See the TSE:6239 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Nagaoka International Corp is engaged in the manufacturing and sale of equipment and systems for energy and water-related industries. The company has two reportable segments: energy-related business and water-related business. The energy-related business focuses on producing screen internals and internal equipment for oil refineries and petrochemical plants. The water-related business is involved in the manufacture and sale of water intake screens, Chemiless and Hisys systems, and the construction of water treatment plants. It generates the majority of its revenue from the Energy-related business segment.
63GF Score
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