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.
Mamiya-OP CoTSE:7991 +2.71%64 Days Inventory is 207.23 as of Mar. 2026, which is 47% above its 10-year median of 140.69. GuruFocus rates TSE:7991 with a GF Score™ of 64/100 and a GF Value™ of 円1,080.09 (Fairly Valued). The stock has 4 warning signs investors should review. Among 2,968 Industrial Products companies, Mamiya-OP Co ranks worse than 66.54% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). Mamiya-OP Co's Average Total Inventories for the
six
months ended in Mar. 2026 was 円6,597 Mil. Mamiya-OP Co's Cost of Goods Sold for the
six
months ended in Mar. 2026 was 円5,810 Mil.
Hence, Mamiya-OP Co's Days Inventory for the
six
months ended in Mar. 2026 was 207.23.
The historical rank and industry rank for Mamiya-OP Co's Days Inventory or its related term are showing as below:
TSE:7991'
s Days Inventory Range Over the Past 10 Years
Min: 101.14 Med: 140.69 Max: 200.17
Current: 162.99
During the past 13 years, Mamiya-OP Co's highest Days Inventory was 200.17. The lowest was 101.14. And the median was 140.69.
TSE:7991's Days Inventory is ranked worse than 66.54% of 2968
companies
in the Industrial Products industry
Industry Median: 119.51
vs TSE:7991: 162.99
Mamiya-OP Co's Days Inventory
increased
from Mar. 2025 (128.35) to Mar. 2026 (207.23).
It might indicate that Mamiya-OP Co's sales slowed down.
Inventory Turnover measures how fast the company turns over its inventory within a year.
Mamiya-OP Co's Inventory Turnover for the
six
months ended in Mar. 2026 was 0.88.
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.
Mamiya-OP Co's Inventory-to-Revenue for the
six
months ended in Mar. 2026 was 0.86.
Mamiya-OP Co (TSE:7991) 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.
Mamiya-OP Co's Inventory Turnover for the
six
months ended in Mar. 2026 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.
Mamiya-OP Co's Inventory to Revenue for the
six
months ended in Mar. 2026 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.
Mamiya-OP Co Days Inventory Related Terms
Mamiya-OP Co Days Inventory Historical Data
* Premium members only.
The historical data trend for Mamiya-OP 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.
For the Business Equipment & Supplies subindustry, Mamiya-OP 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.
Mamiya-OP Co Days Inventory vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Mamiya-OP Co's Days Inventory distribution charts can be found below:
* The bar in red indicates where Mamiya-OP 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.
Mamiya-OP Co (TSE:7991) has a Days Inventory of 207.23 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Mamiya-OP Co and its competitors. This is 47% above median its historical median of 140.69. Over the past decade, Mamiya-OP Co's Days Inventory has ranged from 101.14 to 200.17. According to the industry distribution chart, Mamiya-OP Co ranks #1975 out of 2968 companies in the Industrial Products industry, placing it in the top 66.5%.
Is Mamiya-OP Co's Days Inventory too high?
Mamiya-OP Co's current Days Inventory of 207.23 is 47% above median its 10-year median of 140.69. Over the past 10 years, this metric has ranged from a low of 101.14 to a high of 200.17. The Industrial Products industry median Days Inventory is 119.51. Mamiya-OP Co's value of 207.23 is 73.4% above this industry median. Based on the distribution chart, Mamiya-OP Co ranks #1975 out of 2968 companies in the Industrial Products industry, which is below the industry midpoint. Overall, Mamiya-OP Co has a GF Score™ of 64/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Mamiya-OP Co's Days Inventory compare to competitors?
According to the Industrial Products industry distribution chart, Mamiya-OP Co ranks #1975 out of 2968 companies for Days Inventory. This places Mamiya-OP Co in the lower half of its industry. The industry median Days Inventory is 119.51. Mamiya-OP Co's value of 207.23 is 73.4% above this benchmark. Historically, Mamiya-OP Co's own Days Inventory has ranged from 101.14 to 200.17 over the past decade. While the company's 10-year median is 140.69 vs. the industry median of 119.51, Mamiya-OP 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 Industrial Products company?
The median Days Inventory among Industrial Products companies is 119.51, based on 2,968 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. Mamiya-OP Co's current Days Inventory of 207.23 is 73.4% 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 Mamiya-OP Co and its competitors. For the Industrial Products industry, the median Days Inventory is 119.51 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Mamiya-OP Co's current Days Inventory is 207.23, which is 47% above median its own 10-year median of 140.69. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Mamiya-OP Co stock overvalued right now?
Based on GuruFocus' analysis, Mamiya-OP Co (TSE:7991) is currently considered Fairly Valued. The stock's GF Value™ is 円1,080.09, compared to a current price of 円1,099.00 — trading 1.8% above its estimated fair value. The current Days Inventory is 207.23, which is 47% above median its 10-year median of 140.69 and 73.4% above the Industrial Products industry median of 119.51. Mamiya-OP Co's overall GF Score™ is 64/100 with 4 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 Mamiya-OP Co (TSE:7991), the current Days Inventory is 207.23 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 Mamiya-OP Co (TSE:7991) Overvalued in 2026?
Based on GuruFocus' analysis, Mamiya-OP Co stock appears to be overvalued.
The current stock price of 円1,099.00 is trading 1.8% above its estimated GF Value™ of 円1,080.09.
GuruFocus considers Mamiya-OP Co to be Fairly Valued.
Key valuation signals for TSE:7991:
Days Inventory: 207.23 (47% above median its 10-year median of 140.69)
GF Value™: 円1,080.09 vs. price of 円1,099.00 (1.8% above fair value)
Industry Position: 73.4% above the Industrial Products median (#1975 of 2968)
No single metric tells the full story. See the TSE:7991 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Mamiya-OP Co Ltd manufactures and sells electronic equipment, sports gear, and manages real estate. Its products include pachinko machines, film thickness gauges, ticket vending machines, banknote transport/recognition systems, and waste disposal devices. It also produces golf equipment, shafts, and breaking rods. The company operates through three segments: Electronic Equipment, which develops gaming machines, validators, autonomous systems, and offers installation and maintenance services; Sports, which makes golf gear, archery equipment, and pole vault poles; and Real Estate, which handles property sales, rentals, brokerage, and management.
64GF Score
Get the complete analysis for TSE:7991
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:7991 has been successfully added to your 
