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.
Days Inventory is also known as Days Sales of Inventory (DSI). TAC Co's Average Total Inventories for the
six
months ended in Sep. 2025 was 円871 Mil. TAC Co's Cost of Goods Sold for the
six
months ended in Sep. 2025 was 円5,940 Mil.
Hence, TAC Co's Days Inventory for the
six
months ended in Sep. 2025 was 26.77.
The historical rank and industry rank for TAC Co's Days Inventory or its related term are showing as below:
TSE:4319'
s Days Inventory Range Over the Past 10 Years
Min: 17.8 Med: 24.16 Max: 31
Current: 26.68
During the past 13 years, TAC Co's highest Days Inventory was 31.00. The lowest was 17.80. And the median was 24.16.
TSE:4319's Days Inventory is not ranked
in the Education industry.
Industry Median: 7.99
vs TSE:4319: 26.68
TAC Co's Days Inventory
declined
from Sep. 2024 (27.13) to Sep. 2025 (26.77).
Inventory Turnover measures how fast the company turns over its inventory within a year.
TAC Co's Inventory Turnover for the
six
months ended in Sep. 2025 was 6.82.
Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
TAC Co's Inventory-to-Revenue for the
six
months ended in Sep. 2025 was 0.08.
TAC Co (TSE:4319) Days Inventory Explanation
Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:
1. Inventory Turnover measures how fast the company turns over its inventory within a year.
TAC Co's Inventory Turnover for the
six
months ended in Sep. 2025 is calculated as
2. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
TAC Co's Inventory to Revenue for the
six
months ended in Sep. 2025 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.
Be Aware
A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.
TAC Co Days Inventory Related Terms
TAC Co Days Inventory Historical Data
* Premium members only.
The historical data trend for TAC Co's Days Inventory 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:4319 vs EDU, TAL, LAUR: Days Inventory Comparison
For the Education & Training Services subindustry, TAC Co's Days Inventory, along with its competitors' market caps and Days Inventory 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.
TAC Co Days Inventory vs Education Industry
For the Education industry and Consumer Defensive sector, TAC Co's Days Inventory distribution charts can be found below:
* The bar in red indicates where TAC Co's Days Inventory 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.
TAC Co (TSE:4319) has a Days Inventory of 26.77 as of Sep. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on TAC Co and its competitors. This is 11% above median its historical median of 24.16. Over the past decade, TAC Co's Days Inventory has ranged from 17.80 to 31.00.
Is TAC Co's Days Inventory too high?
TAC Co's current Days Inventory of 26.77 is 11% above median its 10-year median of 24.16. Over the past 10 years, this metric has ranged from a low of 17.80 to a high of 31.00. The Education industry median Days Inventory is 7.99. TAC Co's value of 26.77 is 235% above this industry median. Overall, TAC Co has a GF Score™ of 42/100, reflecting its overall financial health beyond just this single metric.
How does TAC Co's Days Inventory compare to EDU and TAL?
TAC Co's Days Inventory of 26.77 can be compared against companies in the Education industry. The industry median Days Inventory is 7.99. TAC Co's value of 26.77 is 235% above this benchmark. Historically, TAC Co's own Days Inventory has ranged from 17.80 to 31.00 over the past decade. While the company's 10-year median is 24.16 vs. the industry median of 7.99, TAC Co 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 Days Inventory for an Education company?
The median Days Inventory among Education companies is 7.99, based on 156 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. TAC Co's current Days Inventory of 26.77 is 235% 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 Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on TAC Co and its competitors. For the Education industry, the median Days Inventory is 7.99 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. TAC Co's current Days Inventory is 26.77, which is 11% above median its own 10-year median of 24.16. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is TAC Co stock overvalued right now?
TAC Co (TSE:4319) has a current Days Inventory of 26.77. The stock's GF Value™ is 円192.17, compared to a current price of 円347.00 — trading 80.6% above its estimated fair value. The current Days Inventory is 26.77, which is 11% above median its 10-year median of 24.16 and 235% above the Education industry median of 7.99. TAC Co's overall GF Score™ is 42/100 with 10 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For TAC Co (TSE:4319), the current Days Inventory is 26.77 as of Sep. 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 TAC Co (TSE:4319) Overvalued in 2026?
Based on GuruFocus' analysis, TAC Co stock appears to be overvalued.
The current stock price of 円347.00 is trading 80.6% above its estimated GF Value™ of 円192.17.
Key valuation signals for TSE:4319:
Days Inventory: 26.77 (11% above median its 10-year median of 24.16)
GF Value™: 円192.17 vs. price of 円347.00 (80.6% above fair value)
Industry Position: 235% above the Education median
No single metric tells the full story. See the TSE:4319 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
TAC Co Ltd is a Japan-based company engages in providing educational services. The company is engaged in the personal education, corporate training, publishing, and manpower businesses. Its personal education business division offers preparatory courses for qualifications for individual students and provides training for corporations.
42GF Score
Get the complete analysis for TSE:4319
Days Inventory 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:4319 has been successfully added to your 
