*These are case studies showcasing the overall implementation of DENBA products.
Case 1: Maintaining the Freshness of Early-Season Mandarins with DENBA+2.0 at Nanki Tanabe Regional Wholesale Market
【Conditions】
・35 days
・Prefabricated cold room set to 3°C
・With regular human access
【Results】
・Harmful red mold was frequently observed under normal storage.
・Mold was also seen in the DENBA environment, but it was harmless white mold and limited in spread.
・Lowering the temperature range slightly is expected to improve the effect.

Red mold appeared (a lot)

White mold appeared (a little)

Case 2: Refrigerated Storage of Strawberries
【Conditions】
・Comparison between 2 days without DENBA and 10 days with DENBA
・Prefabricated storage set at 0°C
・Stored without freezing
【Results】
・Before introducing DENBA, mold growth was an issue, but after introduction, no mold appeared even after 10 days.
・The ability to adjust shipping timing led to increased sales.


Case 3: Freshness Preservation of Pork Tongue at a Japanese BBQ Restaurant Chain
【Conditions】
・4 days
・Freezing and thawing were performed in a commercial refrigerator set at 3°C
・The refrigerator door was frequently opened and closed
【Results】
・A clear difference in the amount of drip was observed with and without DENBA
・Successfully suppressed flavor loss, leading to increased customer satisfaction
Without DENBA
Before testing

After 96 hours

With DENBA
Before testing

After 96 hours

Case 4: Application of freshness preservation to flowers (Statice from Wakayama Prefecture)
【条件】
【Conditions】
・Applied DENBA freshness preservation technology to flowers
・Photographed flowers on Day 1 and Day 8
・Filmed a video on Day 13, shaking the flowers upside down
【Results】
・Even when the flowers were turned upside down and shaken on Day 13, they hardly scattered, maintaining a fresh and lively appearance
Day 1 (Photo)

Day 2 (Photo)

Day 13 (Video)
Case 5: Truffle storage at a high-end food trading company
・Normally, spores develop within about a week and deterioration due to moisture occurs, but DENBA suppressed this.
・The aroma, which would normally diminish and make the product unsellable, was retained with DENBA.
・The ability to adjust the shipping period led to increased sales.

Case 6: Caviar storage at a high-end food trading company
・Normally, the texture deteriorates after about 3 months, but with the introduction of DENBA, the shelf life was extended by 2 months, allowing the texture and quality to be maintained for up to 5 months.
・By storing part of the caviar without DENBA and part with DENBA, the peak flavor period of the product was extended.
・Thanks to the extended peak flavor period, the caviar could be sold at a higher price over a longer period than usual.


Case 7:Freshness preservation of fish through the introduction of DENBA+2.0 at sushi restaurant Hamazushi
【Conditions】
・Tuna, sea urchin, salmon roe, and white fish are stored in a 0°C storage unit.
【Results】
・Maintaining freshness (color and moisture retention) is difficult with regular storage, but with DENBA, no discoloration occurred and freshness was preserved—earning high praise from sushi chefs.

Case 8: Utilization of DENBA+2.0 at a Japanese eel (Unagi) restaurant
・Two units of DENBA+2.0 were installed in a prefab freezer to enable freezing and freshness preservation.
・Introduced for the purpose of reducing food waste, particularly to preserve the freshness of chopped green onions.

Case 9: Freezing and freshness-preserving thawing of meat at the high-end Japanese BBQ restaurant Shirokanedai Yakiniku Suzakumon
【Conditions】
・Two DENBA Fresh Pro units were installed in a natural refrigerant freezer and refrigerator.
・Meat was frozen using DENBA, then thawed with DENBA freshness preservation.
【Results】
・Beef tongue and skirt steak reached top-grade quality.
・Even after 4 days of storage in plastic wrap, there was no discoloration, trimming was unnecessary, and meat waste was eliminated.


Case 10: Freshness preservation in flat open showcases at supermarkets
・The photo is just one example, but for all beef cuts, a clear difference in color and drip was observed depending on the presence of DENBA Fresh Pro.
・When stored with DENBA Fresh Pro, no issues with color or drip were observed even after 36 hours.
・Without DENBA Fresh Pro, products require a 20% discount sticker based on the standard expiration period in order to sell, but with DENBA Fresh Pro, such discounts are unnecessary, enabling better cost-effectiveness.
・It can also solve issues such as storing chicken and freezer burn in open showcases during summer.
DENBA Fresh Pro: Approximately 180 cm of the showcase can be covered by a single discharge plate.


Case 11: Freshness preservation of strawberries and other fruits at a well-known cake shop in Chiba Prefecture
・To prepare for the spike in strawberry prices during Christmas, freshness preservation was introduced to allow purchasing in advance when market prices are low.
・Also used for preserving a wide range of fruits used in fruit-based cakes.
・DENBA+2.0 was installed without taking up extra space.
・Thanks to the simple installation process, the system was set up during business hours.


Case 12: Provision of thawing warehouse services using DENBA by Minami Nihon Transport & Warehouse Co., Ltd.
・Handles the storage of products for businesses that mainly import frozen meat from Europe.
・Unlike conventional warehouse companies that only offered storage, this service provides paid high-quality thawing using DENBA in a 2°C refrigerated warehouse, and delivers the thawed meat to stores and supermarkets.
・The number of client businesses is increasing, as supermarkets, food retailers, and restaurants can now avoid the time and cost of thawing frozen meat in-house.

Case 13: Yuwa Suisan, a seafood company, prevented quality deterioration during freezing and thawing of farmed oysters
【Issue】
・Frozen oysters suffered significant quality loss due to drip during thawing, limiting shipments to the peak season only.
【Result】
・By applying DENBA+ with slow freezing (−20°C) and thawing at +5°C, the oysters retained pre-freezing quality even after thawing.
・Maintaining high post-thaw quality enabled year-round distribution without being limited to seasonal availability, resulting in expanded sales.
*Additionally, it is worth noting that scallops frozen using DENBA retain high levels of glycogen and are rated as even tastier than freshly caught ones.


Case 14: Oysters frozen using DENBA technology received the Best Award at Gulfood, the largest food exhibition in the Middle East held in Dubai
Yuwa Suisan, a seafood company, received the Best Award in the frozen and refrigerated category at Gulfood 2024, the largest food exhibition in the Middle East held in Dubai (internationally promoted and exhibited at the event by KYnext). Its "Emperor Oyster," preserved using DENBA freezing technology, was selected from approximately 500,000 products.
This award demonstrates that DENBA technology enables advanced freshness control.
Although these oysters are farmed in the Seto Inland Sea of Japan, known for its clean waters and long-standing reputation, they previously could only be enjoyed during a limited season. With DENBA, they can now be enjoyed year-round.

Case 15: Anti-mold preservation of Shine Muscat using DENBA on a farm in Yamagata Prefecture
【Issue】During normal storage, mold would develop on 3–4 grapes per bunch after more than a month.
【Result】After introducing DENBA for storage, no mold was observed, leading to improved quality.

Case 16: Preventing quality deterioration at a high-end Japanese BBQ restaurant in Tokyo
・By installing DENBA in a commercial refrigerator and thawing at a controlled temperature of 1–2°C, uneven thawing was eliminated, resulting in significantly improved knife performance.
・This enabled cleaner cuts, which not only enhanced product presentation but also reduced food waste and improved kitchen workflow.

Case 17: Preventing discoloration of Wagyu beef at Yamagata Meat Public Corporation
・By installing DENBA and storing meat in a prefabricated cold room set at 1°C, temperature was kept stable.
・The vibration of water molecules generated by DENBA suppressed discoloration the following day, eliminating the need for trimming and reducing both food waste and labor costs.

Case 18: Freshness Preservation of Sashimi (Raw Fish) During Thawing of Frozen Products
・By using DENBA to induce subtle vibrations in water molecules and activate them, the chilled range was expanded, creating an environment in the sub-zero range (0°C to -4°C) where freezing is less likely to occur.
・With ordinary freezing and thawing, sashimi often sticks together due to uneven thawing, but with DENBA, thawing occurs evenly, allowing sashimi to be served in a fresh state.
・Typically, the expansion and contraction of water during freezing and thawing damages the cell structure of sashimi, but DENBA prevented this damage.

Case 19: Reducing Drip Loss During Freezing and Thawing of Beef Tongue
・Frozen and thawed beef tongue using DENBA technology.
・The meat was preserved in a fresh state without losing its juices.
・This not only improved profitability but also enhanced customer satisfaction through better quality.

Case 20: Comparison of Food Preservation With and Without DENBA
"Eggplant" on the 35th day of storage

"Chinese cabbage" on the 35th day of storage

Case 21: Food Preservation Using DENBA Marine for Ships
・Frozen and thawed storage was conducted using DENBA.
・This not only improved profitability but also enhanced quality, leading to increased satisfaction among crew members and customers.


Food stored for 20 days




Food stored for 30 days




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