Keiyo Gas Co (TSE:9539) Cyclically Adjusted Book per Share: 円2,772.94 (As of Dec. 2025)

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TSE:9539 Keiyo Gas Co Ltd TSE:9539
66 GF Score
Price 円1,476.00
GF Value 円889.63
Valuation Significantly Overvalued
! 8 Warning Signs
View Full Analysis

What is Keiyo Gas Co Cyclically Adjusted Book per Share?

Keiyo Gas Co TSE:9539 -1.53% 66 Cyclically Adjusted Book per Share is 円2,772.94 as of Dec. 2025. GuruFocus rates TSE:9539 with a GF Score™ of 66/100 and a GF Value™ of 円889.63 (Significantly Overvalued). The stock has 8 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

Keiyo Gas Co's adjusted book value per share for the three months ended in Dec. 2025 was 円3,144.119. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is 円2,772.94 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Keiyo Gas Co's average Cyclically Adjusted Book Growth Rate was 5.30% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 6.10% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 6.60% 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 Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Keiyo Gas Co was 7.10% per year. The lowest was 4.50% per year. And the median was 6.10% per year.

As of today (2026-07-15), Keiyo Gas Co's current stock price is 円1476.00. Keiyo Gas Co's Cyclically Adjusted Book per Share for the quarter that ended in Dec. 2025 was 円2,772.94. Keiyo Gas Co's Cyclically Adjusted PB Ratio of today is 0.53.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Keiyo Gas Co was 0.65. The lowest was 0.32. And the median was 0.48.


Keiyo Gas Co  (TSE:9539) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.

Keiyo Gas Co's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=1476.00/2772.94
=0.53

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Keiyo Gas Co was 0.65. The lowest was 0.32. And the median was 0.48.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Keiyo Gas Co Cyclically Adjusted Book per Share Related Terms


Keiyo Gas Co Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Keiyo Gas Co's Cyclically Adjusted Book per Share 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.

Keiyo Gas Co Cyclically Adjusted Book per Share Chart

Keiyo Gas Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 2,145.07 2,324.15 2,472.92 2,633.27 2,772.94

Keiyo Gas Co Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Cyclically Adjusted Book per Share 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 2,664.73 2,699.94 2,725.72 2,772.94 0.00

TSE:9539 vs ATO, NI: Cyclically Adjusted Book per Share Comparison

For the Utilities - Regulated Gas subindustry, Keiyo Gas Co's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted 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.


Keiyo Gas Co Cyclically Adjusted PB Ratio vs Utilities - Regulated Industry

For the Utilities - Regulated industry and Utilities sector, Keiyo Gas Co's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Keiyo Gas Co's Cyclically Adjusted PB Ratio falls into.


TSE:9539
66GF Score
Keiyo Gas Co Ltd TSE:9539
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Keiyo Gas Co Cyclically Adjusted Book per Share Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

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

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, Keiyo Gas Co's adjusted Book Value per Share data for the three months ended in Dec. 2025 was:

Adj_Book= Book Value per Share /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=3144.119/113.0000*113.0000
=3,144.119

Current CPI (Dec. 2025) = 113.0000.

Keiyo Gas Co Quarterly Data

Book Value per Share CPI Adj_Book
201512 1,964.390 98.100 2,262.753
201603 2,008.421 97.900 2,318.198
201606 2,042.415 98.100 2,352.629
201609 2,049.220 98.000 2,362.876
201612 2,053.947 98.400 2,358.699
201703 2,124.301 98.100 2,446.952
201706 2,178.061 98.500 2,498.689
201709 2,168.863 98.800 2,480.582
201712 2,211.580 99.400 2,514.170
201803 2,277.838 99.200 2,594.715
201806 2,344.656 99.200 2,670.828
201809 2,303.478 99.900 2,605.536
201812 2,218.213 99.700 2,514.123
201903 2,315.214 99.700 2,624.064
201906 2,380.420 99.800 2,695.265
201909 2,382.906 100.100 2,689.994
201912 2,406.757 100.500 2,706.105
202003 2,459.253 100.300 2,770.644
202006 2,519.581 99.900 2,849.977
202009 2,518.835 99.900 2,849.133
202012 2,512.961 99.300 2,859.664
202103 2,556.412 99.900 2,891.637
202106 2,587.213 99.500 2,938.242
202109 2,578.448 100.100 2,910.736
202112 2,576.427 100.100 2,908.454
202203 2,648.888 101.100 2,960.676
202206 2,692.458 101.800 2,988.681
202209 2,672.959 103.100 2,929.625
202212 2,701.757 104.100 2,932.743
202303 2,784.699 104.400 3,014.090
202306 2,847.240 105.200 3,058.347
202309 2,843.601 106.200 3,025.677
202312 2,780.190 106.800 2,941.587
202403 2,892.583 107.200 3,049.085
202406 2,977.919 108.200 3,110.026
202412 2,973.845 110.700 3,035.632
202503 2,942.869 111.100 2,993.197
202506 2,977.888 111.700 3,012.546
202509 3,019.966 112.000 3,046.930
202512 3,144.119 113.000 3,144.119

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

What does a Cyclically Adjusted Book per Share of 円2,772.94 mean?
Keiyo Gas Co (TSE:9539) has a Cyclically Adjusted Book per Share of 円2,772.94 as of Dec. 2025. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Keiyo Gas Co and its competitors.
Is Keiyo Gas Co's Cyclically Adjusted Book per Share too high?
Keiyo Gas Co's current Cyclically Adjusted Book per Share is 円2,772.94. Overall, Keiyo Gas Co has a GF Score™ of 66/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Keiyo Gas Co's Cyclically Adjusted Book per Share compare to ATO and NI?
Keiyo Gas Co's Cyclically Adjusted Book per Share of 円2,772.94 can be compared against companies in the Utilities - Regulated industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for an Utilities - Regulated company?
A good Cyclically Adjusted Book per Share depends on the Utilities - Regulated industry context. However, Cyclically Adjusted Book per Share 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 Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Keiyo Gas Co and its competitors. Keiyo Gas Co's current Cyclically Adjusted Book per Share is 円2,772.94. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Keiyo Gas Co stock overvalued right now?
Based on GuruFocus' analysis, Keiyo Gas Co (TSE:9539) is currently considered Significantly Overvalued. The stock's GF Value™ is 円889.63, compared to a current price of 円1,476.00 — trading 65.9% above its estimated fair value. The current Cyclically Adjusted Book per Share is 円2,772.94. Keiyo Gas Co's overall GF Score™ is 66/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Keiyo Gas Co (TSE:9539), the current Cyclically Adjusted Book per Share is 円2,772.94 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 Keiyo Gas Co (TSE:9539) Overvalued in 2026?

Based on GuruFocus' analysis, Keiyo Gas Co stock appears to be overvalued. The current stock price of 円1,476.00 is trading 65.9% above its estimated GF Value™ of 円889.63. GuruFocus considers Keiyo Gas Co to be Significantly Overvalued.

Key valuation signals for TSE:9539:

  • Cyclically Adjusted Book per Share: 円2,772.94
  • GF Value™: 円889.63 vs. price of 円1,476.00 (65.9% above fair value)
  • GF Score™: 66/100 with 8 warning signs

No single metric tells the full story. See the TSE:9539 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Keiyo Gas Co Business Description

Address 2-8-8 Minami Ichikawa, Chiba Prefecture, Ichikawa, JPN, 272-8580
Keiyo Gas Co Ltd is engaged in gas business. The company produces, process and sells gas byproducts. It is also engaged in production, sales, rental, installation, repair, maintenance and management of gas appliances, kitchen equipment, water supply, and drainage equipment, air conditioning equipment and housing equipment.
66GF Score

Get the complete analysis for TSE:9539

Cyclically Adjusted Book per Share is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

円1,476.00
Price
円889.63
GF Value