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.
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.
Ishizuka Glass CoTSE:5204 +0.33%59 ROC (Joel Greenblatt) % is 4.23% as of Mar. 2026, which is 19% below its 10-year median of 5.21. GuruFocus rates TSE:5204 with a GF Score™ of 59/100 and a GF Value™ of 円2,863.64 (Fairly Valued). The stock has 3 warning signs investors should review. Among 403 Packaging & Containers companies, Ishizuka Glass Co ranks worse than 61.79% on this metric.
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits). He defines ROC (Joel Greenblatt) % as EBIT divided by the total of Property, Plant and Equipment and net working capital. Ishizuka Glass Co's annualized ROC (Joel Greenblatt) % for the quarter that ended in Mar. 2026 was 4.23%.
The historical rank and industry rank for Ishizuka Glass Co's ROC (Joel Greenblatt) % or its related term are showing as below:
TSE:5204'
s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: -4.33 Med: 5.21 Max: 10.58
Current: 6.28
During the past 13 years, Ishizuka Glass Co's highest ROC (Joel Greenblatt) % was 10.58%. The lowest was -4.33%. And the median was 5.21%.
TSE:5204's ROC (Joel Greenblatt) % is ranked worse than 61.79% of 403
companies
in the Packaging & Containers industry
Industry Median: 8.79
vs TSE:5204: 6.28
Ishizuka Glass Co's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 0.00% per year.
Ishizuka Glass Co (TSE:5204) ROC (Joel Greenblatt) % Explanation
The way Joel Greenblatt defines Return on Capital is a more accurate measure of how efficiently the company generates returns onthe capital actually invested in the business. EBIT is used instead of net income because the tax and interest payment may be affected by factors other than the core business operation. Intangible assets are not included in the calculation because they don't need to be replaced.
Ishizuka Glass Co ROC (Joel Greenblatt) % Related Terms
Ishizuka Glass Co ROC (Joel Greenblatt) % Historical Data
* Premium members only.
The historical data trend for Ishizuka Glass Co's ROC (Joel Greenblatt) % 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.
TSE:5204 vs SW, PKG, IP: ROC (Joel Greenblatt) % Comparison
For the Packaging & Containers subindustry, Ishizuka Glass Co's ROC (Joel Greenblatt) %, along with its competitors' market caps and ROC (Joel Greenblatt) % 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.
Ishizuka Glass Co ROC (Joel Greenblatt) % vs Packaging & Containers Industry
For the Packaging & Containers industry and Consumer Cyclical sector, Ishizuka Glass Co's ROC (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where Ishizuka Glass Co's ROC (Joel Greenblatt) % falls into.
Ishizuka Glass Co ROC (Joel Greenblatt) % Calculation
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits) . He defines Return on Capital as follows:
EBIT stands for Earnings Before Interest and Taxes.
Fixed Assets are also known as non-current assets. They include the Property, Plant and Equipment that the firm needs in its operation.
GuruFocus calculates net working capital as: (Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Deferred Revenue + Other Current Liabilities). We're trying to account for OPERATING assets and liabilities (part of daily business) when calculating working capital. Cash and marketable securities are considered NON-OPERATING assets and are not included in calculation. We will also back out all interest bearing debt, short term debt and the portion of long term debt that is due in the current period from the current liabilities. This debt will be considered when computing cost of capital and it would be inappropriate to count it twice.
Note:
The EBIT data used here is two times the semi-annual (Mar. 2026) EBIT data.
* 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.
What does a ROC (Joel Greenblatt) % of 4.23% mean?
Ishizuka Glass Co (TSE:5204) has a ROC (Joel Greenblatt) % of 4.23% as of Mar. 2026. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Ishizuka Glass Co and its competitors. This is 19% below median its historical median of 5.21. According to the industry distribution chart, Ishizuka Glass Co ranks #249 out of 403 companies in the Packaging & Containers industry, placing it in the top 61.8%.
Is Ishizuka Glass Co's ROC (Joel Greenblatt) % too high?
Ishizuka Glass Co's current ROC (Joel Greenblatt) % of 4.23% is 19% below median its 10-year median of 5.21. The Packaging & Containers industry median ROC (Joel Greenblatt) % is 8.79. Ishizuka Glass Co's value of 4.23% is 51.9% below this industry median. Based on the distribution chart, Ishizuka Glass Co ranks #249 out of 403 companies in the Packaging & Containers industry, which is below the industry midpoint. Overall, Ishizuka Glass Co has a GF Score™ of 59/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Ishizuka Glass Co's ROC (Joel Greenblatt) % compare to SW and PKG?
According to the Packaging & Containers industry distribution chart, Ishizuka Glass Co ranks #249 out of 403 companies for ROC (Joel Greenblatt) %. This places Ishizuka Glass Co in the lower half of its industry. The industry median ROC (Joel Greenblatt) % is 8.79. Ishizuka Glass Co's value of 4.23% is 51.9% below this benchmark. While the company's 10-year median is 5.21 vs. the industry median of 8.79, Ishizuka Glass Co 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 ROC (Joel Greenblatt) % for a Packaging & Containers company?
The median ROC (Joel Greenblatt) % among Packaging & Containers companies is 8.79, based on 403 companies in the industry. Companies in the top quartile (top 25%) have a ROC (Joel Greenblatt) % significantly above this median, while those in the bottom quartile fall well below. However, ROC (Joel Greenblatt) % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Ishizuka Glass Co's current ROC (Joel Greenblatt) % of 4.23% is 51.9% 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 ROC (Joel Greenblatt) % mean?
A high ROC (Joel Greenblatt) % can signal that a stock is expensive relative to its fundamentals. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Ishizuka Glass Co and its competitors. For the Packaging & Containers industry, the median ROC (Joel Greenblatt) % is 8.79 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Ishizuka Glass Co's current ROC (Joel Greenblatt) % is 4.23%, which is 19% below median its own 10-year median of 5.21. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Ishizuka Glass Co stock overvalued right now?
Based on GuruFocus' analysis, Ishizuka Glass Co (TSE:5204) is currently considered Fairly Valued. The stock's GF Value™ is 円2,863.64, compared to a current price of 円3,025.00 — trading 5.6% above its estimated fair value. The current ROC (Joel Greenblatt) % is 4.23%, which is 19% below median its 10-year median of 5.21 and 51.9% below the Packaging & Containers industry median of 8.79. Ishizuka Glass Co's overall GF Score™ is 59/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is ROC (Joel Greenblatt) % calculated?
ROC (Joel Greenblatt) % is calculated from a company's financial statements. For Ishizuka Glass Co (TSE:5204), the current ROC (Joel Greenblatt) % is 4.23% as of Mar. 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 Ishizuka Glass Co (TSE:5204) Overvalued in 2026?
Based on GuruFocus' analysis, Ishizuka Glass Co stock appears to be overvalued.
The current stock price of 円3,025.00 is trading 5.6% above its estimated GF Value™ of 円2,863.64.
GuruFocus considers Ishizuka Glass Co to be Fairly Valued.
Key valuation signals for TSE:5204:
ROC (Joel Greenblatt) %: 4.23% (19% below median its 10-year median of 5.21)
GF Value™: 円2,863.64 vs. price of 円3,025.00 (5.6% above fair value)
Industry Position: 51.9% below the Packaging & Containers median (#249 of 403)
No single metric tells the full story. See the TSE:5204 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Ishizuka Glass Co Ltd is engaged in the production and distribution of glass bottles, glass tableware, paper package products, plastic containers, ceramic products in Japan. It offers preforms for PET bottles; mechanical recycled resins for PET bottles; chinaware and other ceramic products; metal caps; and paper packaging products for beverages.
59GF Score
Get the complete analysis for TSE:5204
ROC (Joel Greenblatt) % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
TSE:5204 has been successfully added to your 
