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.
EF-ONTSE:9514 +1.81%69 Days Inventory is 0.00 as of Dec. 2025. GuruFocus rates TSE:9514 with a GF Score™ of 69/100 and a GF Value™ of 円498.13 (Possible Value Trap). The stock has 6 warning signs investors should review. Among 334 Utilities - Independent Power Producers companies, EF-ON ranks worse than 63.17% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). EF-ON's Average Total Inventories for the
three
months ended in Dec. 2025 was 円1,010 Mil. EF-ON's Cost of Goods Sold for the
three
months ended in Dec. 2025 was 円0 Mil.
The historical rank and industry rank for EF-ON's Days Inventory or its related term are showing as below:
TSE:9514'
s Days Inventory Range Over the Past 10 Years
Min: 13.07 Med: 21.16 Max: 44.65
Current: 44.65
During the past 13 years, EF-ON's highest Days Inventory was 44.65. The lowest was 13.07. And the median was 21.16.
EF-ON's Days Inventory
declined
from Jun. 2024 (19.17) to Dec. 2025 (0.00).
Inventory Turnover measures how fast the company turns over its inventory within a year.
EF-ON's Inventory Turnover for the
three
months ended in Dec. 2025 was 0.00.
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.
EF-ON (TSE:9514) 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.
EF-ON's Inventory Turnover for the
three
months ended in Dec. 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.
EF-ON's Inventory to Revenue for the
three
months ended in Dec. 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.
EF-ON Days Inventory Related Terms
EF-ON Days Inventory Historical Data
* Premium members only.
The historical data trend for EF-ON'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.
For the Utilities - Renewable subindustry, EF-ON'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.
EF-ON Days Inventory vs Utilities - Independent Power Producers Industry
For the Utilities - Independent Power Producers industry and Utilities sector, EF-ON's Days Inventory distribution charts can be found below:
* The bar in red indicates where EF-ON'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.
EF-ON (TSE:9514) has a Days Inventory of 0.00 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on EF-ON and its competitors. Over the past decade, EF-ON's Days Inventory has ranged from 13.07 to 44.65. According to the industry distribution chart, EF-ON ranks #211 out of 334 companies in the Utilities - Independent Power Producers industry, placing it in the top 63.2%.
Is EF-ON's Days Inventory too high?
EF-ON's current Days Inventory is 0.00. Over the past 10 years, this metric has ranged from a low of 13.07 to a high of 44.65. Based on the distribution chart, EF-ON ranks #211 out of 334 companies in the Utilities - Independent Power Producers industry, which is below the industry midpoint. Overall, EF-ON has a GF Score™ of 69/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does EF-ON's Days Inventory compare to competitors?
According to the Utilities - Independent Power Producers industry distribution chart, EF-ON ranks #211 out of 334 companies for Days Inventory. This places EF-ON in the lower half of its industry. The industry median Days Inventory is 27.90. Historically, EF-ON's own Days Inventory has ranged from 13.07 to 44.65 over the past decade. 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 Utilities - Independent Power Producers company?
The median Days Inventory among Utilities - Independent Power Producers companies is 27.90, based on 334 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. 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 EF-ON and its competitors. For the Utilities - Independent Power Producers industry, the median Days Inventory is 27.90 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. EF-ON's current Days Inventory is 0.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is EF-ON stock overvalued right now?
Based on GuruFocus' analysis, EF-ON (TSE:9514) is currently considered Possible Value Trap. The stock's GF Value™ is 円498.13, compared to a current price of 円338.00 — trading 32.1% below its estimated fair value. The current Days Inventory is 0.00. EF-ON's overall GF Score™ is 69/100 with 6 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 EF-ON (TSE:9514), the current Days Inventory is 0.00 as of Dec. 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 EF-ON (TSE:9514) Overvalued in 2026?
Based on GuruFocus' analysis, EF-ON stock appears to be undervalued.
The current stock price of 円338.00 is trading 32.1% below its estimated GF Value™ of 円498.13.
GuruFocus considers EF-ON to be Possible Value Trap.
Key valuation signals for TSE:9514:
Days Inventory: 0.00
GF Value™: 円498.13 vs. price of 円338.00 (32.1% below fair value)
No single metric tells the full story. See the TSE:9514 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
EF-ON Inc is an energy service company. It operates through two business segments. The Energy Conservation Support Services segment is involved in the investigation and diagnostication of the energy usage for corporation customers, as well as the design, construction and operation of energy conservation facilities and systems. The Biomass Power Generation segment is engaged in the development, construction and operation of new energy power plants.
69GF Score
Get the complete analysis for TSE:9514
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:9514 has been successfully added to your 
