Koken (TSE:7963) 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.
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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:7963 Koken Ltd TSE:7963
56 GF Score
Price 円1,804.00
GF Value 円446.97
Valuation Significantly Overvalued
! 5 Warning Signs
View Full Analysis

What is Koken E10?

Koken TSE:7963 +0.28% 56 E10 is 円0.00 as of Dec. 2025. GuruFocus rates TSE:7963 with a GF Score™ of 56/100 and a GF Value™ of 円446.97 (Significantly Overvalued). The stock has 5 warning signs 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.

Koken'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.

During the past 12 months, Koken's average E10 Growth Rate was -100.00% per year. 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.

During the past 13 years, the highest 3-Year average E10 Growth Rate of Koken was 11.20% per year. The lowest was 7.00% per year. And the median was 10.40% per year.

As of today (2026-08-07), Koken's current stock price is 円1804.00. Koken's E10 for the quarter that ended in Dec. 2025 was 円0.00. Koken's Shiller PE Ratio of today is .

During the past 13 years, the highest Shiller PE Ratio of Koken was 54.09. The lowest was 12.53. And the median was 18.49.


Koken  (TSE:7963) 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 13 years, the highest Shiller P/E Ratio of Koken was 54.09. The lowest was 12.53. And the median was 18.49.


Be Aware

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


Koken E10 Related Terms


Koken E10 Historical Data

* Premium members only.

The historical data trend for Koken'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.

Koken E10 Chart

Koken Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only 86.97 99.07 110.95 0.00 0.00

Koken 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 125.48 125.08 0.00 0.00 132.28

TSE:7963 vs ABT, SYK, MDT: E10 Comparison

For the Medical Devices subindustry, Koken'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.


Koken Shiller PE Ratio vs Medical Devices & Instruments Industry

For the Medical Devices & Instruments industry and Healthcare sector, Koken's Shiller PE Ratio distribution charts can be found below:

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


TSE:7963
56GF Score
Koken Ltd TSE:7963
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Koken 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, Koken'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.

Koken Quarterly Data

per share eps CPI Adj_EPS
201512 25.531 98.100 29.409
201603 34.830 97.900 40.202
201606 -6.658 98.100 -7.669
201609 22.189 98.000 25.585
201612 26.530 98.400 30.466
201703 46.180 98.100 53.194
201706 10.203 98.500 11.705
201709 13.800 98.800 15.783
201712 28.000 99.400 31.831
201803 43.460 99.200 49.506
201806 -1.784 99.200 -2.032
201809 19.270 99.900 21.797
201812 10.599 99.700 12.013
201903 19.590 99.700 22.203
201906 4.110 99.800 4.654
201909 20.601 100.100 23.256
201912 29.850 100.500 33.563
202003 50.820 100.300 57.255
202006 46.927 99.900 53.081
202009 21.390 99.900 24.195
202012 48.195 99.300 54.844
202103 116.910 99.900 132.241
202106 4.340 99.500 4.929
202109 13.379 100.100 15.103
202112 37.640 100.100 42.491
202203 45.470 101.100 50.822
202206 25.621 101.800 28.440
202209 33.375 103.100 36.580
202212 62.660 104.100 68.017
202303 64.620 104.400 69.943
202306 15.940 105.200 17.122
202309 9.480 106.200 10.087
202312 51.836 106.800 54.845
202403 31.680 107.200 33.394
202406 16.612 108.200 17.349
202412 0.000 110.700 0.000
202503 52.700 111.100 53.601
202506 6.910 111.700 6.990
202509 0.000 112.000 0.000
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?
Koken (TSE:7963) 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 Koken and its competitors.
Is Koken's E10 too high?
Koken's current E10 is 円0.00. Overall, Koken has a GF Score™ of 56/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Koken's E10 compare to ABT and SYK?
Koken's E10 of 円0.00 can be compared against companies in the Medical Devices & Instruments 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 a Medical Devices & Instruments company?
A good E10 depends on the Medical Devices & Instruments 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 Koken and its competitors. Koken'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 Koken stock overvalued right now?
Based on GuruFocus' analysis, Koken (TSE:7963) is currently considered Significantly Overvalued. The stock's GF Value™ is 円446.97, compared to a current price of 円1,804.00 — trading 303.6% above its estimated fair value. The current E10 is 円0.00. Koken's overall GF Score™ is 56/100 with 5 warning signs 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 Koken (TSE:7963), 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 Koken (TSE:7963) Overvalued in 2026?

Based on GuruFocus' analysis, Koken stock appears to be overvalued. The current stock price of 円1,804.00 is trading 303.6% above its estimated GF Value™ of 円446.97. GuruFocus considers Koken to be Significantly Overvalued.

Key valuation signals for TSE:7963:

  • E10: 円0.00
  • GF Value™: 円446.97 vs. price of 円1,804.00 (303.6% above fair value)
  • GF Score™: 56/100 with 5 warning signs

No single metric tells the full story. See the TSE:7963 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Koken Business Description

Address 7, Yonbancho, Chiyoda-ku, Tokyo, JPN, 102 8459
Koken Ltd is engaged in the production and sales of occupational and health protective equipment, including particulate respirators, chemical cartridge respirators, and others. It is also involved in the production and sales of environmental quality improvement equipment.
56GF Score

Get the complete analysis for TSE:7963

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

円1,804.00
Price
円446.97
GF Value