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Hitachi Home Electronics Asia (Singapore)


Made In Japan G Series
  • Twetter


  • Crystal Champagne


Vacuum Compartment

Vacuum Compartment

Approx. 0.8atm

*Image is for illustrative purposes only.

For Meat, Fish, Dairy and Processed Foods

Hitachi’s uniquely designed Vacuum Preservation can achieve approximately 0.8atm capabilities, suppressing oxidation, thus ensuring freshness of food while retaining its nutrients. Furthermore, the airtight structure of the compartment confines moisture inside, thus helping to prevent dehydration of stored food.

*Vacuum means the space where the pressure is lower than the atmospheric pressure. The pressure in the Vacuum Compartment is about 0.8atm, which is lower than the atmosphere pressure.

Freshness Preservation with New
Platinum Catalyst

Odor components from meat and fish are broken down by the Platinum Catalyst to generate carbon dioxide. The carbon dioxide dissolves in water on the surface of food items to make the surface weakly acidic, which suppresses enzyme strength to minimize loss of freshness.

Resolve, Odor, Carbon Dioxide, Water Molecule, Water

2 Temperature Zones

Selecting the Vacuum Sub Zero mode for items such as meat, fish and processed food, and the Vacuum Chilled mode setting for items such as vegetables and tofu let you store food without freezing them. This helps to prevent deterioration of flavor and texture due to freezing.

Approx.-1°C Vacuum Sub Zero Mode, Approx.+1°C Vacuum Chilled Mode

Freshness After Storing
for 3 Days

*K-value of Chicken Breast

Approx. 8% Less

*K-value of Sea Bream

Approx. 5% Less

*K-value of Tuna

Approx. 0.7% Less

Nutrients After Storing
for 3 Days

EPA in Mackerel

Approx. 27% More

Vitamin E in Yellowtail

Approx. 15% More

DHA in Horse Mackerel

Approx. 7% More

Tested by Hitachi. The effect differs depending on models and conditions.

*K-value is an indication of freshness.

Quick Seasoning

The vacuum compartment removes air from stored food, allowing the seasoning to be absorbed at a faster rate* so that less time is required in food preparation.



Radish with 10mm diameter, soaked for 3 hours.

*Tested by Hitachi. The effect differs depending on the models and conditions.

Reduces Dehydration in Food

Drying of stored items is reduced. Now you can store opened items and dishes you want to store for a while without the need for troublesome wrapping.

Sliced Ham (After 24 Hours)

Refrigerator Compartment

Vacuum Compartment

Sliced Cheese (After 24 Hours)

Refrigerator Compartment

Vacuum Compartment

Aero-care Vege Compartment

Aero-care Vege Compartment

Platinum Catalyst

The Power of Platinum for Vegetables and Fruits

Uniquely designed to maintain freshness and nutrients in vegetables, the Aero-care Vege Compartment puts food under the power of a Platinum Catalyst, producing increased carbon dioxide to control respiration of vegetables and limiting the consumption of nutrients in the environment to prevent loss of freshness.
In addition, the improved airtight seal of the compartment increases humidity, with the Humidity Control unit also releasing excess moisture, vegetables remain in optimal condition, further ensuring they retain their freshness and nutrients.

Platinum Catalyst

Odor components that come into contact with the catalyst are broken down into carbon dioxide and water.

Platinum Catalyst, Ethylene Gas, Odor Components, Upper Case, Tall Storage Space, Water, Carbon Dioxide, Resolve

*Image is for illustrative purposes only.

As a Result of Joint Research by Hokkaido University and Hitachi

Highly efficient even at low temperatures, the Platinum Catalyst developed by Hokkaido University breaks down ethylene and odor components inside the refrigerator into carbon dioxide. By maintaining a higher concentration of carbon dioxide than that in the air, Platinum preservation suppresses respiration of vegetables, and the action of enzymes on the surface of meat and fish to retain freshness and nutrients.

Professor Atsushi Fukuoka,
Catalysis Research Center,
Hokkaido University

Optimal Moisture Storage in Vegetable Compartment

Carbon Dioxide


Optimal Humidity

Close the door and the moisture cover acts as a lid over the entire vegetable compartment for improved sealing. Carbon dioxide concentration increases while moisture is kept in, helping to prevent drying. Excess moisture is released outside the case by the moisture unit to maintain the optimum amount of moisture and prevent condensation.

Moisture Cover, Humidity Control Unit

*Image is for illustrative purposes only.

Sustain Freshness and Nutrients with Platinum Catalyst
(After Storing for 7 Days in Aero-Care Vege Compartment)

Japanese Mustard Spinach

Approx. 96.6% Moisture Retention*

Vitamin CApprox. 13% Improved Retention*

Beefsteak Plant

Approx. 86.0% Moisture Retention*

Vitamin EApprox. 12% Improved Retention*

Salad Leaves

Approx. 95.7% Moisture Retention*

PolyphenolApprox. 20% Improved Retention*


Approx. 93.8% Moisture Retention*

Vitamin CApprox. 4% Improved Retention*

*Tested by Hitachi. Comparison of the Aero-care Vege Compartment in the new model and the Moist Vegetable Compartment (without Platinum Preservation) in the previous model. The effect differs depending on the models and conditions.

Energy Saving

Energy Saving

A range of technologies such as Frost Recycling Cooling and Vacuum Insulation Panels, new technologies such as Multi-valve Control have been added to further ensure energy-saving performance.

Hitachi Original Flexible Vacuum Insulation Panel (VIP)

Large Capacity and Energy Saving

Using the conventional insulation material of urethane foam together with highly efficient vacuum insulation panels enables both large capacity and energy-saving performance.

Outer Bag, Inner Bag, Glass Wool, Glass Fiber about 4µm

*The location, shape and number of vacuum insulation panels differs depending on the model.

Hitachi Original Frost Recycling Cooling Technology with Hybrid Defrost

Effective Use of Frost for Cooling

When the compressor isn't operating, frost formed in the condenser when it was operating is used to cool the refrigerator and vegetable compartments. Frost results in energy consumption, but this is reduced by defrosting with heaters. Cooling with frost in the condenser is based on the same principle as cooling with ice.

*Image is for illustrative purposes only.

Regular Cooling, Frost Recycling Cooling

Convenient Eco
Intelligent Control

Convenient Eco Intelligent Control

Cuts power consumption by about 10 – 12% compared to that during regular operation.
(Room temperature of 16°C32°C)*

Save Mode

1LED Lighting (Inside the Refrigerator)

Lighting dims when the door has been left open for 30 seconds, to prompt the user to quickly shut the door.

2Controlled Compressor Operation

Lowers the rotation speed of the compressor.

Temperature (in Each Compartment)

Slowly cools the compartment without affecting food preservation.

Door Alarm

The alarm sounds when door has been left open for 30 seconds. In normal mode, alarm only sounds when door has been open for 1 minute.

Indications for Smart Use

ecoOperation Sign

This lights up when operation is comparatively stable. It goes out when there is a heavy load on the refrigerator such as during rapid freezing.

*Tested by Hitachi.

Shelves and Pockets with
Adjustable Height

Shelves and Pockets with Adjustable Height

1Pockets with Adjustable Height

2Tempered Glass Shelves

3Height Adjustable Shelves

Adjustable Tempered Glass Shelves

The heights of 1st and 2nd shelves from the top can be adjusted to match your needs. Also large pots and tall bottles can be stored by changing the layout of height-adjustable shelves on the lower levels.

Pockets with Adjustable Height

Height can be adjusted to two levels depending on the size of the food items.

Freezer Compartment Large Storage Capacity

Freezer Compartment

Upper Freezer Compartment, Lower Freezer Compartment, 1st Level, Around 5cm Deep, 2nd Level, Around 8cm Deep, 3rd Level, Around 14cm Deep, Vertical Storage Space (Approx. 23.5cm High)

Large Storage Capacity

Large capacity ready to hold about 5 shopping baskets of food.

The measurements and rated capacities are based on the R-X730GS using a 22L capacity basket.

Tech Spec

Gross Capacity [L] Total : 529
Refrigerator Compartment : 236
Vacuum Compartment : 2+9
Vegetable Compartment : 95
Ice Compartment : 27
Freezer (Upper + Lower) : 169
Storage Capacity [L] Total : 383
Refrigerator Compartment : 231
Vacuum Compartment : 10
Vegetable Compartment : 66
Ice Compartment : 6
Freezer (Upper + Lower) : 76
Refrigerator Compartment  Vacuum Compartment
Powerful Cooling
Height Adjustable Pocket/Shelf (Shelf Only)
Freezer Compartment Aluminum Tray (Upper)
Three-layer Freezer Case & Tall Storage
(Lower Freezer Compartment)
Quick Freezing
Low Temperature Freezing Mode
Automatic Ice-Maker
Vegetable Compartment Aero-care Vegetable Compartment (Under Tray Only)
Door  Tempered Glass Surface
General Features Triple Deodorisation Filter
Frost Recycling Cooling
Eco Intelligent Control
Smart Lifestyle Memory
Energy Saving Mode
Control Panel (Touch Screen Controller)
Dimensions (WxDxH) [mm]*1 620 x 733 x 1818
Body Color Crystal Champagne (XN)
Excluding handle and leg cover