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KDDISTU:DIP +1.67%80 Shiller PE Ratio is 20.38 as of Sep. 11, 2026, which is 8% above its 10-year median of 18.93. GuruFocus rates STU:DIP with a GF Score™ of 80/100 and a GF Value™ of €14.99 (Modestly Overvalued). The stock has 10 warning signs investors should review. Among 218 Telecommunication Services companies, KDDI ranks worse than 55.05% on this metric.
As of today (2026-09-11), KDDI's current share price is €16.715. KDDI's E10 for the fiscal year that ended in Mar26 was €0.82. KDDI's Shiller PE Ratio for today is 20.38.
The historical rank and industry rank for KDDI's Shiller PE Ratio or its related term are showing as below:
STU:DIP'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 15.59 Med: 18.93 Max: 30.89
Current: 19.27
During the past 13 years, KDDI's highest Shiller PE Ratio was 30.89. The lowest was 15.59. And the median was 18.93.
STU:DIP's Shiller PE Ratio is ranked worse than 55.05% of 218
companies
in the Telecommunication Services industry
Industry Median: 17.415
vs STU:DIP: 19.27
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.
KDDI's adjusted earnings per share data of for the fiscal year that ended in Mar26 was €1.001. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is €0.82 for the trailing ten years ended in Mar26.
Shiller PE for Stocks: The True Measure of Stock Valuation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
KDDI Shiller PE Ratio Related Terms
KDDI Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for KDDI's Shiller PE Ratio 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.
STU:DIP vs VZ, TMUS, T: Shiller PE Ratio Comparison
For the Telecom Services subindustry, KDDI'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.
KDDI Shiller PE Ratio vs Telecommunication Services Industry
For the Telecommunication Services industry and Communication Services sector, KDDI's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where KDDI's Shiller PE Ratio falls into.
For Shiller PE Ratio, 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 PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
KDDI's Shiller PE Ratio for today is calculated as
* 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.
KDDI's E10 for the fiscal year that ended in Mar26 is calculated as:
For example, KDDI's adjusted earnings per share data for the fiscal year that ended in Mar26 was:
Add all the adjusted EPS together and divide 10 will get our 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.
KDDI (STU:DIP) has a Shiller PE Ratio of 20.38 as of Sep. 11, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on KDDI and its competitors. This is near median its historical median of 18.93. Over the past decade, KDDI's Shiller PE Ratio has ranged from 15.59 to 30.89. According to the industry distribution chart, KDDI ranks #120 out of 218 companies in the Telecommunication Services industry, placing it in the top 55%.
Is KDDI's Shiller PE Ratio too high?
KDDI's current Shiller PE Ratio of 20.38 is near median its 10-year median of 18.93. Over the past 10 years, this metric has ranged from a low of 15.59 to a high of 30.89. The Telecommunication Services industry median Shiller PE Ratio is 17.42. KDDI's value of 20.38 is 17% above this industry median. Based on the distribution chart, KDDI ranks #120 out of 218 companies in the Telecommunication Services industry, which is below the industry midpoint. Overall, KDDI has a GF Score™ of 80/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does KDDI's Shiller PE Ratio compare to VZ and TMUS?
According to the Telecommunication Services industry distribution chart, KDDI ranks #120 out of 218 companies for Shiller PE Ratio. This places KDDI in the lower half of its industry. The industry median Shiller PE Ratio is 17.42. KDDI's value of 20.38 is 17% above this benchmark. Historically, KDDI's own Shiller PE Ratio has ranged from 15.59 to 30.89 over the past decade. While the company's 10-year median is 18.93 vs. the industry median of 17.42, KDDI 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 Shiller PE Ratio for a Telecommunication Services company?
The median Shiller PE Ratio among Telecommunication Services companies is 17.42, based on 218 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. KDDI's current Shiller PE Ratio of 20.38 is 17% 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 Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on KDDI and its competitors. For the Telecommunication Services industry, the median Shiller PE Ratio is 17.42 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. KDDI's current Shiller PE Ratio is 20.38, which is near median its own 10-year median of 18.93. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is KDDI stock overvalued right now?
Based on GuruFocus' analysis, KDDI (STU:DIP) is currently considered Modestly Overvalued. The stock's GF Value™ is €14.99, compared to a current price of €16.72 — trading 11.5% above its estimated fair value. The current Shiller PE Ratio is 20.38, which is near median its 10-year median of 18.93 and 17% above the Telecommunication Services industry median of 17.42. KDDI's overall GF Score™ is 80/100 with 10 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For KDDI (STU:DIP), the current Shiller PE Ratio is 20.38 as of Sep. 11, 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 KDDI (STU:DIP) Overvalued in 2026?
Based on GuruFocus' analysis, KDDI stock appears to be overvalued.
The current stock price of €16.72 is trading 11.5% above its estimated GF Value™ of €14.99.
GuruFocus considers KDDI to be Modestly Overvalued.
Key valuation signals for STU:DIP:
Shiller PE Ratio: 20.38 (near median its 10-year median of 18.93)
GF Value™: €14.99 vs. price of €16.72 (11.5% above fair value)
Industry Position: 17% above the Telecommunication Services median (#120 of 218)
No single metric tells the full story. See the STU:DIP stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
KDDI is Japan's second-largest wireless operator (30% market share), the largest pay-TV operator (53% market share) and the second-largest provider of fibre-to-the-home broadband (12% market share). It has grown through acquisition and is focusing on increasing the number of customers who subscribe to more than one telecommunication service. It is also looking to grow its Life Design business which includes commerce, energy, and finance and had over 57 million Internet of Things connections by the end of March 2026.
80GF Score
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