Tsubota LaboratoryTSE:4890 -0.45%63 Piotroski F-Score is 4 as of Jun. 28, 2026, which is at its 10-year median of 4.00. GuruFocus rates TSE:4890 with a GF Score™ of 63/100 and a GF Value™ of 円83.95 (Significantly Overvalued). The stock has 4 warning signs investors should review. Among 807 Medical Devices & Instruments companies, Tsubota Laboratory ranks worse than 56.51% on this metric.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Tsubota Laboratory has an F-score of 4 indicating the company's financial situation is typical for a stable company.
The historical rank and industry rank for Tsubota Laboratory's Piotroski F-Score or its related term are showing as below:
TSE:4890'
s Piotroski F-Score Range Over the Past 10 Years
Min: 3 Med: 4 Max: 6
Current: 4
During the past 7 years, the highest Piotroski F-Score of Tsubota Laboratory was 6. The lowest was 3. And the median was 4.
The developer of the system is Joseph D. Piotroski is relatively unknown accounting professor who shuns publicity and rarely gives interviews.
He graduated from the University of Illinois with a B.S. in accounting in 1989, received an M.B.A. from Indiana University in 1994. Five years later, in 1999, after earning a Ph.D. in accounting from the University of Michigan, he became an associate professor of accounting at the University of Chicago.
He wanted to see if he can develop a system (using a simple nine-point scoring system) that can increase the returns of a strategy of investing in low price to book (referred to in the paper as high book to market) value companies.
What he found was something that exceeded his most optimistic expectations.
Buying only those companies that scored highest (8 or 9) on his nine-point scale, or F-Score as he called it, over the 20 year period from 1976 to 1996 led to an average out-performance over the market of 13.4%.
Even more impressive were the results of a strategy of investing in the highest F-Score companies (8 or 9) and shorting companies with the lowest F-Score (0 or 1).
Over the same period from 1976 to 1996 (20 years) this strategy led to an average yearly return of 23%, substantially outperforming the average S&P 500 index return of 15.83% over the same period.
Tsubota Laboratory Piotroski F-Score Related Terms
Tsubota Laboratory Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Tsubota Laboratory's Piotroski F-Score 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:4890 vs ABT, SYK, MDT: Piotroski F-Score Comparison
For the Medical Devices subindustry, Tsubota Laboratory's Piotroski F-Score, along with its competitors' market caps and Piotroski F-Score 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.
Tsubota Laboratory Piotroski F-Score vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Tsubota Laboratory's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Tsubota Laboratory's Piotroski F-Score falls into.
* 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.
*Note: If the latest quarterly/semi-annual/annual total assets data is 0, then we will use previous quarterly/semi-annual/annual data for all the items in the balance sheet.
Profitability
Question 1. Return on Assets (ROA)
Net income before extraordinary items for the year divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
Tsubota Laboratory's current Net Income (TTM) was -761.8.
==> Negative ==> Score 0.
Question 2. Cash Flow Return on Assets (CFROA)
Net cash flow from operating activities (operating cash flow) divided by Total Assets at the beginning of the year.
Tsubota Laboratory's return on assets of this year was -0.30434581. Tsubota Laboratory's return on assets of last year was 0.08965218.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Tsubota Laboratory's gearing of this year was 0.02455845. Tsubota Laboratory's gearing of last year was 0.02884949.
==> This year is lower or equal to last year. ==> Score 1.
Question 6. Change in Working Capital (Liquidity)
Compare this year's current ratio (current assets divided by current liabilities) to last year's current ratio.
Score 1 if this year's current ratio is higher, 0 if it's lower
Tsubota Laboratory's current ratio of this year was 3.13997789. Tsubota Laboratory's current ratio of last year was 2.88826367.
==> This year's current ratio is higher. ==> Score 1.
Question 7. Change in Shares in Issue
Compare the number of shares in issue this year, to the number in issue last year.
Score 0 if there is larger number of shares in issue this year, 1 otherwise.
Tsubota Laboratory's number of shares in issue this year was 25.756. Tsubota Laboratory's number of shares in issue last year was 25.981.
==> There is smaller number of shares in issue this year, or the same. ==> Score 1.
Efficiency
Question 8. Change in Gross Margin
Compare this year's gross margin (Gross Profit divided by sales) to last year's.
Score 1 if this year's gross margin is higher, 0 if it's lower.
Tsubota Laboratory's gross margin of this year was 0.65777265. Tsubota Laboratory's gross margin of last year was 0.86719651.
==> Last year's gross margin is higher ==> Score 0.
Question 9. Change in asset turnover
Compare this year's asset turnover (total sales for the year divided by total assets at the beginning of the year) to last year's asset turnover ratio.
Score 1 if this year's asset turnover ratio is higher, 0 if it's lower
Tsubota Laboratory's asset turnover of this year was 0.07990898. Tsubota Laboratory's asset turnover of last year was 0.59130239.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Tsubota Laboratory has an F-score of 4 indicating the company's financial situation is typical for a stable company.
Tsubota Laboratory (TSE:4890) has a Piotroski F-Score of 4 as of Jun. 28, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Tsubota Laboratory and its competitors. This is near median its historical median of 4.00. Over the past decade, Tsubota Laboratory's Piotroski F-Score has ranged from 3.00 to 6.00. According to the industry distribution chart, Tsubota Laboratory ranks #456 out of 807 companies in the Medical Devices & Instruments industry, placing it in the top 56.5%.
Is Tsubota Laboratory's Piotroski F-Score too high?
Tsubota Laboratory's current Piotroski F-Score of 4 is near median its 10-year median of 4.00. Over the past 10 years, this metric has ranged from a low of 3.00 to a high of 6.00. The Medical Devices & Instruments industry median Piotroski F-Score is 5.00. Tsubota Laboratory's value of 4 is 20% below this industry median. Based on the distribution chart, Tsubota Laboratory ranks #456 out of 807 companies in the Medical Devices & Instruments industry, which is below the industry midpoint. Overall, Tsubota Laboratory has a GF Score™ of 63/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Tsubota Laboratory's Piotroski F-Score compare to ABT and SYK?
According to the Medical Devices & Instruments industry distribution chart, Tsubota Laboratory ranks #456 out of 807 companies for Piotroski F-Score. This places Tsubota Laboratory in the lower half of its industry. The industry median Piotroski F-Score is 5.00. Tsubota Laboratory's value of 4 is 20% below this benchmark. Historically, Tsubota Laboratory's own Piotroski F-Score has ranged from 3.00 to 6.00 over the past decade. While the company's 10-year median is 4.00 vs. the industry median of 5.00, Tsubota Laboratory 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 Piotroski F-Score for a Medical Devices & Instruments company?
The median Piotroski F-Score among Medical Devices & Instruments companies is 5.00, based on 807 companies in the industry. Companies in the top quartile (top 25%) have a Piotroski F-Score significantly above this median, while those in the bottom quartile fall well below. However, Piotroski F-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Tsubota Laboratory's current Piotroski F-Score of 4 is 20% 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 Piotroski F-Score mean?
A high Piotroski F-Score can signal that a stock is expensive relative to its fundamentals. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Tsubota Laboratory and its competitors. For the Medical Devices & Instruments industry, the median Piotroski F-Score is 5.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Tsubota Laboratory's current Piotroski F-Score is 4, which is near median its own 10-year median of 4.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tsubota Laboratory stock overvalued right now?
Based on GuruFocus' analysis, Tsubota Laboratory (TSE:4890) is currently considered Significantly Overvalued. The stock's GF Value™ is 円83.95, compared to a current price of 円221.00 — trading 163.3% above its estimated fair value. The current Piotroski F-Score is 4, which is near median its 10-year median of 4.00 and 20% below the Medical Devices & Instruments industry median of 5.00. Tsubota Laboratory's overall GF Score™ is 63/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Piotroski F-Score calculated?
Piotroski F-Score is calculated from a company's financial statements. For Tsubota Laboratory (TSE:4890), the current Piotroski F-Score is 4 as of Jun. 28, 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 Tsubota Laboratory (TSE:4890) Overvalued in 2026?
Based on GuruFocus' analysis, Tsubota Laboratory stock appears to be overvalued.
The current stock price of 円221.00 is trading 163.3% above its estimated GF Value™ of 円83.95.
GuruFocus considers Tsubota Laboratory to be Significantly Overvalued.
Key valuation signals for TSE:4890:
Piotroski F-Score: 4 (near median its 10-year median of 4.00)
GF Value™: 円83.95 vs. price of 円221.00 (163.3% above fair value)
Industry Position: 20% below the Medical Devices & Instruments median (#456 of 807)
No single metric tells the full story. See the TSE:4890 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Tsubota Laboratory Inc is engaged in the research and development of pharmaceuticals and medical devices for the treatment of myopia, dry eyes, and presbyopia.
63GF Score
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