Hokkaido University Research Profiles

Life Sciences

MIRASAL, a Device for Visualizing the Freshness of and Best Timing for Eating Food Animals


  • Yuji Shinohara Postdoctoral Fellow

A device for evaluating the freshness of and the best timing for eating food animals to ensure safety and security

In collaboration with the National Institute of Advanced Industrial Science and Technology (AIST), we have developed a visualization device called MIRASAL to evaluate the freshness of and the best timing for eating food animals by using a simulation method to determine the concentration of degraded components in any part of a food animal (aquatic or livestock animal), which changes over the course of time after the animal has died.

Content of research

At the wholesale markets in fish and shellfish production and consumption areas, freshness is an important criterion in the determination of transaction prices, and the K value has been proposed as an evaluation index. However, since the K-value is calculated by sampling any part of a postmortem marine animal and analyzing the components after various pretreatments, real-time evaluation (understanding) at the distribution site is not possible. Aiming to solve this problem using an appropriate simulation method, we have developed a device that can evaluate the freshness and the best timing to eat fish and shellfish based on various information such as the type and size of the fish and shellfish, the elapsed time since death, and the storage temperature, using the method described above. We are currently working on the acquisition of the rights to the invention and for improvement of its portability (for use with smartphones, etc.). This device “MIRASAL” can also be applied to livestock animals such as beef, chicken, and pork.

  • Fig. 1 Input screen of the freshness evaluation device under development and an example of calculation results

  • Fig. 2 MIRASAL website under development.

Potential for social implementation

  • ・Implementation with products related to fisheries and livestock industries (mobile terminals, fishing boats, transport vehicles, etc.)
  • ・Implementation with distribution industry-related products (mobile terminals, trucks, transport boxes, etc.)
  • ・Implementation with retail industry-related products (mobile terminals, low-temperature showcases, etc.)
  • ・Implementation with products related to consumer use (mobile terminals, refrigerators, etc.)

Appealing points to industry and local governments

With MIRASAL, customers involved in sales channels will be able to easily obtain freshness information, and those involved in the fisheries and livestock industries will be able to plan distribution routes and estimate an appropriate storage temperature and storage time based on the required freshness at the final consumption point. This will directly lead to, for example, a reduction in the fuel consumption of fishing vessels, and the results are also expected to improve the safety and reliability of food and to reduce food losses.

Intellectual property related to this research

特願2021-030109 「食用動物の鮮度・熟成度評価装置、及び、鮮度・熟成度評価方法」
台湾/110107808 「食用動物の鮮度・熟成度評価装置、及び、鮮度・熟成度評価方法」
米国/17/909459 「食用動物の鮮度・熟成度評価装置、及び、鮮度・熟成度評価方法」
2023/7/19Update ,2022/5/27Released