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Unique Refrigerating Machines with Supercooling Technology for High-Quality Food Preservation: Kuraban

Unique Refrigerating Machines with Supercooling Technology for High-Quality Food Preservation: Kuraban

MARS Company

Freezer with Advanced Freezing Technology That Can Maintain Food Freshness 3 to 10 Times Longer Than Regular Refrigerators

urabanK is a product with advanced freezing technology that can maintain food freshness 3 to 10 times longer than regular refrigerators. It is used for storing various kinds of food such as fishery products (sea food) that usually need to be frozen for longer storage. “Kuraban” is particularly beneficial for food that is easily damaged by normal unfreezing processes. “Kuraban” can significantly improve the quality of refrigerated food, by skipping the thawing process and avoiding cellular damage to food.

Major Features and Advantages

  • Freshness
    Enables to maintain freshness of products 3 to 10 times longer by keeping food refrigerated with -2℃
  • Speed and Sanitation
    Enables to reduce food loss by keeping food matured and sanitized
  • Defrosting
    Enables to maintain high quality by minimizing cell destruction and food drip with temperature control
    ※Food drip: Juice from the inside of food when it is thawed. Juice includes the original flavor and umami of the food.
                    Fig. 1 Comparison of preserved states of foods between Kuraban and a conventional refrigerator

Technology Data

Possible applications

In the short term, we believe that “Kuraban” can contribute to accomplish the following three goals:
(1) To increase sales opportunities by decreasing the volume of food loss such as deteriorated fish and vegetables.
(2) To add value to fishery (sea food) and agricultural products.
(3) To expand exportable market and create new business opportunities.

In the medium term, it will increase the income level of fishermen, farmers and other people concerned including exporters.
In the long term, “Kuraban” will develop fishery and agricultural industry by strengthening their competitiveness, increasing the value of fishery and agricultural products and expanding the market.

Competitive advantage

“Kuraban” has a great advantage in the refrigeration technology which enables to keep fishery and agricultural products fresh in a long period of time. It reduces cost in freezing and defrosting by providing refrigeration technology.
By applying an electric field in the refrigerator using a N-Te-Fe (see Fig. 2) energy system, it is possible to carry out refrigeration storage for a long period of time without freezing food even under freezing point as well as performing antibacterial and oxidation control.
The effect of the system is to achieve 3 to 10 times longer-term preservation than conventional refrigerators.
                                                                   Fig. 2 Images of N-TeFe device

This will contribute to develop an advanced cold chain with an affordable cost. Initial expense will only be purchasing “Kuraban” and electronic fee which “Kuraban” and space parts require to run.


It enables to maintain freshness of products 3 times to 10 times longer than regular refrigerators.

                                                                 Fig. 3 Specification of Kuraban

                                                                Table 1 Advantages of Kuraban

Technical maturity / Past record of introduction

FY18: 35 units (31 in Japan and 4 in foreign countries (Thai, New Zealand and Morocco)) as of January 2019

Application at installed sites:
Steak House: Long-term preservation of meat, provision of aged meat
Hotels: Maintenance of freshness of food, Compression of food loss
Butcher: Production of aged meat
Japanese restaurant: Long-term preservation of meat and Fish, production of aged meat
Soba Shop: Long-term storage of Soba to improve process efficiency
Sweets Shop: Keep purchase price by long-term preservation of strawberries

Information on patent related to this technology

Patent No. 3747218 (JP)

Company Data

Name MARS Company
Address Tonyamachinishi 1-1-2 Takasaki, Gunma, Japan
Capital 99 million JPY (as of June 30, 2019)
Contact person


Number of employees 10 (as of June 30, 2019)
Date of company foundation July 7, 2006
The type of business

Manufacturing, sales and R&D

International operation

Number of employees for international operation 


Overseas offices
City, Country Name of Company
(if applicable)

Modality of business transaction

Direct investment
Core components which produce N-TeFe energy will be exported from MARS Company (Japan), and Commercial refrigerator and other components are selected from local companies and assemble them at local factory. Investment for Establish local factories and support bases will be made with MARS and partner company in the company and its partner companies in Japan or local company.

Local Partner will import core components which produce N-TeFe energy from MARS Company (Japan), and assemble it with local refrigerators and other components at local factory. The local partner has also responsibility to set up service and maintenance network and MARS Company will provide local companies with technical guidance necessary for service and maintenance.


Schematic illustration of the technology

Kuraban Product Video

Japanese version

French version

Contact Person(s)

Mr. Masaki OHNO (CEO)E-mail:

*Please mention that you saw UNIDO's website when making the first contact with the company.

Registered Category

  • Agribusiness Technologies : Food value chain