About HYOKAN

What is Hyokan?


This is a technology that safely and stably applies high voltage (low current, constant frequency electrical energy) to traditional refrigeration technology, imparting beneficial effects to food materials. By applying voltage, a high electric field is created, making it difficult for the food materials to freeze, thereby achieving non-freezing preservation at low temperatures. It is one method to solve the conventional challenges associated with food preservation.

This is a technology that safely and stably applies high voltage (low current, constant frequency electrical energy) to traditional refrigeration technology, imparting beneficial effects to food materials. By applying voltage, a high electric field is created, making it difficult for the food materials to freeze, thereby achieving non-freezing preservation at low temperatures. It is one method to solve the conventional challenges associated with food preservation.

Hyokan Structure

The voltage in Hyokan ranges from 3,500 to 7,000 volts. The shelves are made of aluminum so that the voltage is reliably transmitted to the food.

Because, as the diagram shows, a Hyokan fridge is structured to transmit the voltage to the food, items can be stored in a temperature range around the freezing point.

The voltage in Hyokan ranges from 3,500 to 7,000 volts. The shelves are made of aluminum so that the voltage is reliably transmitted to the food.
Because, as the diagram shows, a Hyokan fridge is structured to transmit the voltage to the food, items can be stored in a temperature range around the freezing point.

Features of Hyokan

Maintain Freshness

Agricultural products begin to lose freshness immediately after they are harvested. Hyokan can slow this loss of freshness. By using Hyokan technology, natural freshness can be maintained for a long time, and products can be distributed in a state close to that of just after harvest.

*The results below are given as examples. Results may vary depending on product, location, or time.

Corn

Mizuna (murasaki mizuna)

After four weeks in a normal refrigerator, mold starts to grow on the leaves and discoloration can be observed on some of the kernels. But even after four weeks in the Hyokan fridge, the outward appearance is unchanged from when it was first put into storage.

Discoloration began after two weeks in a refrigerator, and as you can see in the photo, yellowing is evident after one month. On the other hand, after one month in the Hyokan fridge, you can see the color is unchanged.

Refrigerator

Hyokan

Refrigerator

Hyokan

Shine Muscat

Strawberries

After one month in a refrigerator, grapes are falling of the stem and discoloration has begun. Meanwhile, after even three months in Hyokan, the bunch is holding together, and the fruit’s firmness is unchanged from the beginning of storage.

Three months into refrigerator storage, mold has grown, but even after 50 days have passed in Hyokan, the appearance and flavor have been maintained unchanged.

Refrigerator

Hyokan

Refrigerator

Hyokan

Corn

After four weeks in a normal refrigerator, mold starts to grow on the leaves and discoloration can be observed on some of the kernels. But even after four weeks in the Hyokan fridge, the outward appearance is unchanged from when it was first put into storage.

Refrigerator

Hyokan

Mizuna(Murasaki Mizuna)

Discoloration began after two weeks in a refrigerator, and as you can see in the photo, yellowing is evident after one month. On the other hand, after one month in the Hyokan fridge, you can see the color is unchanged.

Refrigerator

Hyokan

Shine Muscut

After one month in a refrigerator, grapes are falling of the stem and discoloration has begun. Meanwhile, after even three months in Hyokan, the bunch is holding together, and the fruit’s firmness is unchanged from the beginning of storage.

Refrigerator

Hyokan

Strawberries

Three months into refrigerator storage, mold has grown, but even after 50 days have passed in Hyokan, the appearance and flavor have been maintained unchanged.

Refrigerator

Hyokan

Beef (Hida Beef)

An experiment was carried out with vacuum-packed Hida beef stored in a refrigerator and a Hyokan fridge under matching conditions. Storage in Hyokan suppressed the levels of living bacteria.
In an evaluation carried out by nine participants, no off odors were detected even after 80 days in Hyokan, whereas it only took 40 days in a normal refrigerator for such odors to be identified.

After 80 days in Hyokan

Tuna (akami)

This experiment was about Tuna’s typical quick discoloration, but even after 15 days, there was no change in color.
Additionally, the K-value (which is a measure of freshness for fish) remained well below 20%, meaning it can be eaten raw.

Stored in Hyokan
Stored in Hyokan

Beef (Hida beef)

An experiment was carried out with vacuum-packed Hida beef stored in a refrigerator and a Hyokan fridge under matching conditions. Storage in Hyokan suppressed the levels of living bacteria.
In an evaluation carried out by nine participants, no off odors were detected even after 80 days in Hyokan, whereas it only took 40 days in a normal refrigerator, such odors to be identified.

80 days in Hyokan

Tuna (akami)

This experiment was about Tuna’s typical quick discoloration, but even after 15 days, there was no change in color.
Additionally, the K-value (which is a measure of freshness for fish) remained well below 20%, meaning it can be eaten raw.

Stored in Hyokan
Stored in Hyokan

Hyokan Aging

For some agricultural products, an increase in umami can be achieved through low temperature aging (low-temperature acclimation). The inhibition of bacterial growth also makes low temperature aging possible for meat, resulting in better yields for aged products.

Examination of changes in amino acids after one week in Hyokan

• Hyokan Type/Standard Hyokan • Conditions/Temperature: -2°C Voltage: 3,500V

Hyokan Thawing

Products can be defrosted at low temperatures in Hyokan. This makes it possible to thaw the product without using water or ice water or raising the temperature. In Hyokan, the product is thawed from the center, which minimizes drip loss and prevents deterioration of flavor.