Helpful in Emergencies
Power Source Solutions

Typhoons, earthquakes and other natural disasters have been occurred frequently in Japan.
When they occur, getting the electricity needed for daily life can be a major problem.

Power outages cause anxiety from darkness and a lack of information

Anxiety from darkness

Without electricity, nighttime lighting is lost and our surroundings become pitch black. Such darkness brings anxiety and makes it difficult to move around at night.

Anxiety from a lack of information

When a disaster strikes, people often cannot use the smartphones and other electronic devices to get information on what’s happening or to confirm if families and friends are safe. In addition to the darkness, such a lack of information makes them even more anxious. Long-term power outages in Japan following the 2018 Hokkaido Earthquake and Typhoon Faxai in 2019 led to long lines of people waiting to recharge their smartphones at emergency power generators.

Fifure:Power outages cause anxiety from darkness and a lack of information

NTN has developed power generators that utilize bearing technology

Power source solutions in emergencies

To quickly clear these anxieties, NTN supplies natural energy products that generate electricity from wind, water and solar light, thereby providing the power source solutions necessary in emergencies.

Fifure:Power source solutions in emergencies

Power generator set that can be delivered to disaster areas in emergencies


Photo:N エヌキューブ

Three power generators stored in a container

Photo:Three power generators stored in a container

“N3 N-CUBE” is an independent power supply that combines three types of generators (wind, water and solar light) and a storage battery in a single freight container.
It can be transported quickly to disaster-stricken areas by a variety of means including 4-ton truck, cargo ship or helicopter.

Quick delivery and set up in disaster-stricken areas

Photo:N3 N-CUBE

Because “N3 N-CUBE” is a 10-feet freight container, it can be transported quickly to stricken areas after a disaster. It can be carried on a 4-ton truck or cargo ship or slung under a helicopter, and is designed to withstand the harsh transport environments of disaster areas, where road conditions tend to be poor.
It takes only one hour by two people to set up the container and start power generation. No special certifications are required.

Enough electricity to power an ordinary home for a day when fully charged

The battery of “N3 N-CUBE” can store 8.6kWh of electricity. While an ordinary home uses about 10kWh of power for a day on average, “N3 N-CUBE” can meet the home’s needs for a day when devices that are essential for daily life (such as refrigerator, lights and television) are used. Moreover, it can recharge about 2,000 smartphones per day and also provide the power needed to operate microwave ovens, rice cookers and other household appliances.

Usable as rest area, changing room and nursing room

In addition to supplying power, another major problem that arises when a disaster strikes is the care of senior citizens, babies and expectant mothers. With this in mind, the container of “N3 N-CUBE” is designed so that shelves for relief supplies, rest benches and curtains can be installed inside. It makes its space useful for a variety of purposes, including as a rest area, changing room and nursing room.

Usage scenarios of “N3 N-CUBE”

Supply electricity needed for daily life during emergencies

When transported to areas hit by typhoon, heavy rain, earthquake or other disasters,
“N3 N-CUBE” supports lives affected.

As a power source for various devices

Today, mobile phones, smartphones and PCs are essential in daily life, and “N3 N-CUBE” can provide the power needed to run them. When fully charged, its storage battery can recharge about 2,000 smartphones.
“N3 N-CUBE” can also supply power for rice cookers, microwave ovens, pots and other cooking appliances, thus making it possible to cook rice and warm milk for babies.
It can also provide light at night for walking safely.
Photo:Electrical outlets are standard equipment on the container's inside and outside
Electrical outlets are standard equipment on the container’s inside and outside

As a storeroom for supplies

The container can be used to store emergency kits, food supplies, water and other emergency supplies with the installation of storage shelves.
Photo:As a storeroom for supplies
Storage shelves can be desgined depending on various supplies

As a private space

Installing benches and curtains in the container quickly converts it into a changing room or nursing space.
Photo:As a private space
Benches and curtains can be installed inside

Advantages of “N3 N-CUBE” compared to
conventional emergency warehouse

-No need to control noise or odor-

The power generators commonly used in emergency warehouse need gas cartridges, gasoline, diesel oil and others to operate. They require refueling for their sustained use. It also needs measures to control noise, exhaust and odors during electrical generation.
Each prefecture in Japan makes efforts to install and maintain emergency warehouse equipped with power generators. Even so, the number of generators is only about three per every 10,000 people (calculated based on "the current state of local disaster prevention administration, as of April 1, 2017" issued by the Fire and Disaster Management Agency, Ministry of Internal Affairs and Communications).
“N3 N-CUBE” does not require refueling because it is an independent power supply that uses natural energy. Moreover, its wind turbine uses a proprietary blade shape that makes it extremely quiet. The turbine provides stable power generation without creating wind noise that disturbs the comfort and safety of evacuation center living environments.

Useful for crime prevention and communication

Crime prevention
Supply power for security cameras
Supply power for Wi-Fi/Provide a communication environment for residents and tourists
Recharge smartphone and other electronic devices
Photo:Useful for crime prevention and communication

Actual use of “N3 N-CUBE” in areas
suffering power outages due to a typhoon

In September 2019, Typhoon Faxai (No.15) hit the Kanto region in Japan. It destroyed buildings and caused tremendous damage throughout the region, and triggered a power outage in Chiba Prefecture and 600,000 homes were affected.
In view of the critical situation, NTN offered to provide disaster assistance to Kyonan Town in Chiba Prefecture, a community that was especially hard hit. NTN trucked the “N3 N-CUBE” from Kuwana City, Mie Prefecture, where its development division is located. After power in Kyonan Town was largely restored, “N3 N-CUBE” was relocated to Futtsu City in Chiba Prefecture to continue providing support.
Having arrived on site fully charged, the “N3 N-CUBE” was put to immediate use recharging mobile phones, PCs and home appliances. It also provided light at night. When a telecommunications company began providing service through mobile base stations, the Wi-Fi equipment installed in the “N3 N-CUBE” came into operation and was used by residents who could not use their home’s fixed-line telephones.
The micro hydro turbine was not used as there were no rivers nearby. However, both the solar panels and wind turbine generated power during the day, and the wind turbine did so at night. As a result, the “N3 N-CUBE” succeeded in providing power stably for nine days.

  • Photo:Immediate transport by truck
    Immediate transport by truck
  • Photo:Residents recharging their devices at “N3 N-CUBE”
    Residents recharging their devices at “N3 N-CUBE”
  • Photo:Provide light at night
    Provide light at night


Green Energy Products Division
Business Development Department.

  • Click here to contact NTN by email

5-105 Hidamarinooka, Kuwana-shi,
Mie 511-0867, Japan