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On-site inspection of product quantity

Last updated on March 27, 2019.

On-site inspection of product quantity

On-site inspections at supermarkets, etc.

Inspection scenery

Supermarkets sell a large number of foodstuffs. Some individual products have "weight" displayed. In order to display the appropriate weight, "use of proper measuring instruments" and "appropriate weighing" are indispensable. Maintaining "appropriate measurement" is required every day, such as horizontal installation of measuring instruments, correct tare setting, and re-measurement of products that evaporate moisture.
The Yokohama City Metrology Inspection Center conducts on-site inspections and instructs supermarkets in Yokohama City on the display of the weight of products so that consumers can purchase products with peace of mind.

Target products

Image of fresh fish
Fresh fish

Image of meat
Meat

The on-site inspection of product quantities is performed by extracting products from "meat", "fresh fish", "vegetables", and "side dishes" that are closely related to our diet.

Image of fruits and vegetables
Fruits and vegetables

Image of side dishes
Side dish

The display of "weight" is very convenient for consumers to judge "how much they need" and "which is heavier in the same product" in their daily consumer life. . In addition, "unit price" (the value of the product based on unit price, etc.) makes it possible to compare products across departments, and it is very important that "weight" is appropriate from this point of view.

Specific products and quantity tolerances

The Measurement Law designates 29 products that should be regulated for consumer protection from among products that are likely to be weighed and sold as "specified products".
For this "specific product", the error "quantity tolerance" allowed in the display of "weight" is individually regulated.

An example of permissible error "quantity tolerance"

An example of permissible error "quantity tolerance"
Product classification	Display amount	Amount tolerance
Beef, pork, chicken, ham, bacon Salt Tarako, Screen, Salt Number Child Tea, coffee beans, sugar, miso	More than 100g to less than 500g	２％
	More than 500g to less than 1kg	１０g
	More than 1kg to less than 25kg	１％
Lotus root, potatoes, peas Tomato, apple, banana, takuan Tuna Sashimi, yellowtail and taragiri	More than 100g to less than 500g	３％
	More than 500g to less than 1.5kg	１５g
	More than 1.5kg to less than 10kg	１％
Soy sauce, rice vinegar, sake, whiskey Beer, mirin, kerosene, lubricating oil	More than 100ml to less than 500ml	２％
	More than 500ml to less than 1L	１０ml
	Over 1L to 25L or less	１％

Click here for "Specific Products and Volume tolerance Application Table" (PDF: 115KB)

Major causes of insufficient quantity

The following causes are mainly the causes of the shortage exceeding the "quantity tolerance".

Example of insufficient quantity

Examples of shortcomings
Major causes	Cases to be careful	Applicable divisions
Natural weight loss	Water evaporation of warm products	Side dish
Natural weight loss	Moisture evaporation of products with high moisture content Click here for "Natural weight loss survey results of vegetables" (PDF: 1,289KB)	Fruits and vegetables
Incorrect tare setting	Adding wasabi, sauce, etc.	Fresh fish
	Change to a different tray	All divisions
	Changed sashimi tsuma and nakashiki	Fresh fish

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Inquiries to this page

Economic Affairs Bureau, Ministry of Economy, Trade and Industry, Consumer Economy Division

Phone: 045-671-2587

Fax: 045-664-9533

E-Mail address [email protected]

List of related pages Open the menu of related page list

On-site inspection of product quantity
On-site inspections of other business sites
On-site inspection of specified measuring instruments

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