Nagaoka International (TSE:6239) E10: 円0.00 (As of Dec. 2025)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

TSE:6239 Nagaoka International Corp TSE:6239
63 GF Score
Price 円1,322.00
GF Value 円889.34
Valuation Significantly Overvalued
! 1 Warning Sign
View Full Analysis

What is Nagaoka International E10?

Nagaoka International TSE:6239 -1.05% 63 E10 is 円0.00 as of Dec. 2025. 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.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.

Nagaoka International's adjusted earnings per share data for the three months ended in Dec. 2025 was 円0.000. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is 円0.00 for the trailing ten years ended in Dec. 2025.

Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the E10 growth rate using E10 data.

As of today (2026-07-15), Nagaoka International's current stock price is 円1322.00. Nagaoka International's E10 for the quarter that ended in Dec. 2025 was 円0.00. Nagaoka International's Shiller PE Ratio of today is .

During the past 12 years, the highest Shiller PE Ratio of Nagaoka International was 35.65. The lowest was 27.68. And the median was 31.08.


Nagaoka International  (TSE:6239) E10 Explanation

If a company grows much fast than inflation, E10 may underestimate the company's earnings power. Shiller PE Ratio can seem to be too high even the actual P/E is low.

For the Shiller P/E, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller P/E is also called PE10.

The Shiller P/E was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.

During the past 12 years, the highest Shiller P/E Ratio of Nagaoka International was 35.65. The lowest was 27.68. And the median was 31.08.


Be Aware

Shiller PE Ratio works better for cyclical companies. It gives you a better idea on the company's real earnings power.


Nagaoka International E10 Related Terms


Nagaoka International E10 Historical Data

* Premium members only.

The historical data trend for Nagaoka International's E10 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.

Nagaoka International E10 Chart

Nagaoka International Annual Data
Trend Jun16 Jun17 Jun18 Jun19 Jun20 Jun21 Jun22 Jun23 Jun24 Jun25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 46.78

Nagaoka International Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
E10 Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 40.64 46.78 42.07 0.00 0.00

TSE:6239 vs VLO, MPC, PSX: E10 Comparison

For the Oil & Gas Refining & Marketing subindustry, Nagaoka International's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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 Shiller PE Ratio vs Oil & Gas Industry

For the Oil & Gas industry and Energy sector, Nagaoka International's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where Nagaoka International's Shiller PE Ratio falls into.


TSE:6239
63GF Score
Nagaoka International Corp TSE:6239
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Nagaoka International E10 Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. When we calculate the today's Shiller P/E ratio of a stock, we use today's price divided by E10.

What is E10? How do we calculate E10?

E10 is the average of the inflation adjusted earnings of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the E10 of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the earnings from 2001 through 2010.

We adjusted the earnings of 2001 earnings data with the total inflation from 2001 through 2010 to the equivalent earnings in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart earned $1 a share in 2001, then the 2001's equivalent earnings in 2010 is $1.4 a share. If Wal-Mart earns $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 earnings in 2010 is $1.35. So on and so forth, you get the equivalent earnings of past 10 years. Then you add them together and divided the sum by 10 to get E10.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

For example, Nagaoka International's adjusted earnings per share data for the three months ended in Dec. 2025 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=0/113.0000*113.0000
=0.000

Current CPI (Dec. 2025) = 113.0000.

Nagaoka International Quarterly Data

per share eps CPI Adj_EPS
201512 -18.693 98.100 -21.532
201603 -125.560 97.900 -144.926
201606 -1.450 98.100 -1.670
201609 -16.200 98.000 -18.680
201612 -34.980 98.400 -40.170
201703 -54.486 98.100 -62.762
201706 -59.335 98.500 -68.070
201709 9.205 98.800 10.528
201712 11.003 99.400 12.508
201803 10.257 99.200 11.684
201806 -4.775 99.200 -5.439
201809 5.410 99.900 6.119
201812 17.530 99.700 19.869
201903 26.350 99.700 29.865
201906 2.954 99.800 3.345
201909 37.480 100.100 42.310
201912 34.870 100.500 39.207
202003 16.464 100.300 18.549
202006 12.679 99.900 14.342
202009 25.310 99.900 28.629
202012 21.230 99.300 24.159
202103 22.830 99.900 25.824
202106 27.333 99.500 31.041
202109 18.660 100.100 21.065
202112 38.824 100.100 43.827
202203 13.120 101.100 14.664
202206 42.170 101.800 46.810
202209 17.810 103.100 19.520
202212 13.907 104.100 15.096
202303 47.340 104.400 51.240
202306 43.989 105.200 47.251
202309 26.020 106.200 27.686
202312 35.400 106.800 37.455
202403 54.780 107.200 57.744
202406 47.978 108.200 50.106
202412 0.000 110.700 0.000
202503 22.810 111.100 23.200
202506 67.960 111.700 68.751
202509 -6.670 112.000 -6.730
202512 0.000 113.000 0.000

Add all the adjusted EPS together and divide 10 will get our e10.

Frequently Asked Questions Learn more about E10 →
What does a E10 of 円0.00 mean?
Nagaoka International (TSE:6239) has a E10 of 円0.00 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Nagaoka International and its competitors.
Is Nagaoka International's E10 too high?
Nagaoka International's current E10 is 円0.00. 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 E10 compare to VLO and MPC?
Nagaoka International's E10 of 円0.00 can be compared against companies in the Oil & Gas industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good E10 for an Oil & Gas company?
A good E10 depends on the Oil & Gas industry context. However, E10 should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high E10 mean?
A high E10 can signal that a stock is expensive relative to its fundamentals. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Nagaoka International and its competitors. Nagaoka International's current E10 is 円0.00. 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 E10 is 円0.00. 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 E10 calculated?
E10 is calculated from a company's financial statements. For Nagaoka International (TSE:6239), the current E10 is 円0.00 as of Dec. 2025. 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:

  • E10: 円0.00
  • GF Value™: 円889.34 vs. price of 円1,322.00 (48.6% above fair value)
  • GF Score™: 63/100 with 1 warning sign

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 Business Description

Industry EnergyOil & Gas
Address 1-8-15, Azuchimachi, 7th Floor, Nomura Osaka Building, Chuo-ku, Osaka, JPN, 541-0052
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

Get the complete analysis for TSE:6239

E10 is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

円1,322.00
Price
円889.34
GF Value