Yamaki Co (TSE:3598) Operating Income: 円-310 Mil (TTM As of Mar. 2026)

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:3598 Yamaki Co Ltd TSE:3598
51 GF Score
Price 円165.00
GF Value 円143.50
Valuation Modestly Overvalued
! 6 Warning Signs
View Full Analysis

What is Yamaki Co Operating Income?

Yamaki Co TSE:3598 +1.85% 51 Operating Income is 円-310 Mil as of Mar. 2026. GuruFocus rates TSE:3598 with a GF Score™ of 51/100 and a GF Value™ of 円143.50 (Modestly Overvalued). The stock has 6 warning signs investors should review.

Yamaki Co's Operating Income for the six months ended in Mar. 2026 was 円-409 Mil. Its Operating Income for the trailing twelve months (TTM) ended in Mar. 2026 was 円-310 Mil.

Operating Margin % is calculated as Operating Income divided by its Revenue. Yamaki Co's Operating Income for the six months ended in Mar. 2026 was 円-409 Mil. Yamaki Co's Revenue for the six months ended in Mar. 2026 was 円4,500 Mil. Therefore, Yamaki Co's Operating Margin % for the quarter that ended in Mar. 2026 was -9.09%.

Yamaki Co's 5-Year average Growth Rate for Operating Margin % was 0.00% per year.

Operating Income or EBIT is linked to Return on Capital for both regular definition and Joel Greenblatt's definition. Yamaki Co's annualized ROC % for the quarter that ended in Mar. 2026 was -11.08%. Yamaki Co's annualized ROC (Joel Greenblatt) % for the quarter that ended in Mar. 2026 was -38.20%.


Yamaki Co  (TSE:3598) Operating Income Explanation

1. Operating Income or EBIT is linked to Return on Capital for both regular definition and Joel Greenblatt's definition.

Yamaki Co's annualized ROC % for the quarter that ended in Mar. 2026 is calculated as:

ROC % (Q: Mar. 2026 )
=NOPAT/Average Invested Capital
=Operating Income * ( 1 - Tax Rate % )/( (Invested Capital (Q: Sep. 2025 ) + Invested Capital (Q: Mar. 2026 ))/ count )
=-818.118 * ( 1 - 0% )/( (7268.025 + 7497.144)/ 2 )
=-818.118/7382.5845
=-11.08 %

where

Invested Capital(Q: Sep. 2025 )
=Total Assets - Accounts Payable & Accrued Expense - Excess Cash
=Total Assets - Accounts Payable & Accrued Expense - ( Cash, Cash Equivalents, Marketable Securities - max(0, Total Current Liabilities - Total Current Assets+Cash, Cash Equivalents, Marketable Securities))
=10897.948 - 1411.65 - ( 2218.273 - max(0, 5519.623 - 7783.873+2218.273))
=7268.025

Invested Capital(Q: Mar. 2026 )
=Total Assets - Accounts Payable & Accrued Expense - Excess Cash
=Total Assets - Accounts Payable & Accrued Expense - ( Cash, Cash Equivalents, Marketable Securities - max(0, Total Current Liabilities - Total Current Assets+Cash, Cash Equivalents, Marketable Securities))
=9972.311 - 1413.812 - ( 1663.712 - max(0, 5761.098 - 6822.453+1663.712))
=7497.144

Note: The Operating Income data used here is two times the semi-annual (Mar. 2026) data.

2. Joel Greenblatt's definition of Return on Capital:

Yamaki Co's annualized ROC (Joel Greenblatt) % for the quarter that ended in Mar. 2026 is calculated as:

ROC (Joel Greenblatt) %(Q: Mar. 2026 )
=EBIT/Average of (Net fixed Assets + Net Working Capital)
=EBIT/Average of (Property, Plant and Equipment+Net Working Capital)
     Q: Sep. 2025  Q: Mar. 2026
=EBIT/( ( (Property, Plant and Equipment + Net Working Capital) + (Property, Plant and Equipment + Net Working Capital) )/ count )
=-2081.468/( ( (2357.554 + max(3286.558, 0)) + (2373.44 + max(2880.078, 0)) )/ 2 )
=-2081.468/( ( 5644.112 + 5253.518 )/ 2 )
=-2081.468/5448.815
=-38.20 %

where Working Capital is:

Working Capital(Q: Sep. 2025 )
=(Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Defer. Rev. + Other Current Liabilities)
=(1789.037 + 3418.048 + 358.515) - (1411.65 + 0 + 867.392)
=3286.558

Working Capital(Q: Mar. 2026 )
=(Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Defer. Rev. + Other Current Liabilities)
=(1614.965 + 2988.505 + 478.271) - (1413.812 + 0 + 787.851)
=2880.078

When net working capital is negative, 0 is used.

Note: The EBIT data used here is two times the semi-annual (Mar. 2026) EBIT data.

3. Operating Income is also linked to Operating Margin %:

Yamaki Co's Operating Margin % for the quarter that ended in Mar. 2026 is calculated as:

Operating Margin %=Operating Income (Q: Mar. 2026 )/Revenue (Q: Mar. 2026 )
=-409.059/4499.694
=-9.09 %

* 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.

4. 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 Operating Income growth rate using Operating Income per share data.


Be Aware

Compared with a company's EBITDA margin, Operating Margin can be manipulated by adjusting the rate of depreciation, depletion and amortization (DDA).

If a company is facing competition, its Operating Margin may decline. Often the Operating Margin declines well before the company's revenue or even profit decline. Therefore, Operating Margin is a very important indicator of whether the company is facing problems.

For instance, by 2012, Nokia (NOK)'s problems were well known and its stock had lost more than 90% of its market value since 2007. But Nokia's Operating Margin had already been in decline since 2002, although its earnings per share were still rising. Investors who paid attention to Operating Margin would have avoided this huge loss. The same can be said for Research-in-Motion (RIMM).

Therefore, Operating Margin is a very important screening filter for GuruFocus. GuruFocus's Buffett-Munger screener requires that the profit margin is either consistent or expanding. The Model Portfolio of the Buffett-Munger screener has outperformed the market every year since inception in 2009.


Yamaki Co Operating Income Related Terms


Yamaki Co Operating Income Historical Data

* Premium members only.

The historical data trend for Yamaki Co's Operating Income 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.

Yamaki Co Operating Income Chart

Yamaki Co Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Operating Income
Get a 7-Day Free Trial Premium Member Only Premium Member Only -1,026.95 -101.40 221.01 48.56 -310.48

Yamaki Co Semi-Annual Data
Sep16 Mar17 Sep17 Mar18 Sep18 Mar19 Sep19 Mar20 Sep20 Mar21 Sep21 Mar22 Sep22 Mar23 Sep23 Mar24 Sep24 Mar25 Sep25 Mar26
Operating Income 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 -60.38 99.06 -50.50 98.58 -409.06
TSE:3598
51GF Score
Yamaki Co Ltd TSE:3598
Operating Income is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Yamaki Co Operating Income Calculation

Operating Income, is the profit a company earned through operations. All expenses, including cash expenses such as cost of goods sold (COGS), research & development, wages, and non-cash expenses, such as depreciation, depletion and amortization, have been deducted from the sales.

Operating Income for the trailing twelve months (TTM) ended in Mar. 2026 adds up the semi-annually data reported by the company within the most recent 12 months, which was 円-310 Mil.

* 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.

Frequently Asked Questions Learn more about Operating Income →
What does a Operating Income of 円-310 Mil mean?
Yamaki Co (TSE:3598) has a Operating Income of 円-310 Mil as of Mar. 2026. Operating Income equals sales less all operating expenses. It is linked to EBIT. View historical data on Yamaki Co and its competitors.
Is Yamaki Co's Operating Income too high?
Yamaki Co's current Operating Income is 円-310 Mil. Overall, Yamaki Co has a GF Score™ of 51/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Yamaki Co's Operating Income compare to RL and LEVI?
Yamaki Co's Operating Income of 円-310 Mil can be compared against companies in the Manufacturing - Apparel & Accessories industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Operating Income for a Manufacturing - Apparel & Accessories company?
A good Operating Income depends on the Manufacturing - Apparel & Accessories industry context. However, Operating Income 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 Operating Income mean?
A high Operating Income can signal that a stock is expensive relative to its fundamentals. Operating Income equals sales less all operating expenses. It is linked to EBIT. View historical data on Yamaki Co and its competitors. Yamaki Co's current Operating Income is 円-310 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Yamaki Co stock overvalued right now?
Based on GuruFocus' analysis, Yamaki Co (TSE:3598) is currently considered Modestly Overvalued. The stock's GF Value™ is 円143.50, compared to a current price of 円165.00 — trading 15% above its estimated fair value. The current Operating Income is 円-310 Mil. Yamaki Co's overall GF Score™ is 51/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Operating Income calculated?
Operating Income is calculated from a company's financial statements. For Yamaki Co (TSE:3598), the current Operating Income is 円-310 Mil 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 Yamaki Co (TSE:3598) Overvalued in 2026?

Based on GuruFocus' analysis, Yamaki Co stock appears to be overvalued. The current stock price of 円165.00 is trading 15% above its estimated GF Value™ of 円143.50. GuruFocus considers Yamaki Co to be Modestly Overvalued.

Key valuation signals for TSE:3598:

  • Operating Income: 円-310 Mil
  • GF Value™: 円143.50 vs. price of 円165.00 (15% above fair value)
  • GF Score™: 51/100 with 6 warning signs

No single metric tells the full story. See the TSE:3598 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Yamaki Co Business Description

Address 1-3-1 Uemachi, Chuo-ku, Osaka, JPN, 540 0005
Yamaki Co Ltd is a Japan-based company engages in the planning, manufacture, and sale of men's and women's shirts. It offers dress shirts, casual wear, and ladies' shirts under the brand name CHOYA 1886, CHOYA SHIRT FACTORY, LORDSON and SHIRT HOUSE.
51GF Score

Get the complete analysis for TSE:3598

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

円165.00
Price
円143.50
GF Value