A new government-led campaign aims to improve Japan's overall energy efficiency 35% by 2030.

The next generation Toyota Prius engine achieves 40% thermal efficiency, says a report in Nikkei Technology. Toyota made the announcement at last week’s Spring Conference of the Society of Automotive Engineers in Yokohama, Japan.

Some 22 years after an on-site survey began, construction on a large-scale geothermal power plant in Akita Prefecture kicked off Monday.

Asahi Glass Co., Japan has brought to the Trade Fair Entech Hanoi 2015 a technology of energy saving glass which can potentially save over 30% of energy.

AJapanese technology firm Ricoh is looking at its new "energy-generating rubber" as one solution. According the company, the new piezoelectric polymer converts pressure and vibration into electric energy with high efficiency, yet is extremely flexible and durable.

Four Japanese companies have developed a cogeneration system that recovers hot wastewater with high efficiency from a gas engine in the form of steam, announced the companies on Thursday.

Because it is extremely expensive to run the heat, lights and refrigerators around the clock, convenience stores throughout Japan have developed innovative ways to save money and energy.

In order to verify effectiveness of related technologies and provide a model of a smart community, numerous smart community demonstration projects have been conducted across Japan.

The government on Friday launched its annual Cool Biz energy-saving campaign for late spring and summer.

Japanese electronics maker Nichia has developed laser technology that could make LCD televisions 25% more energy efficient than LED-based TVs, sources told The Nikkei on Tuesday.

Since 2008, the Japanese Space Agency (JAXA) has been working hard to develop technologies to transmit electricity wirelessly.

Ocean energy turbines have been trickling into the global marketplace and Japan has an ocean energy ace up its sleeve: the Kuroshio Current.

A new experimental “smart town” based especially around the technologies of solar energy and battery storage is being developed in Japan by Panasonic Corporation (along with other public and private partners), based on recent reports.

Japanese conglomerate Marubeni Corp. said Thursday it signed an agreement to build three solar power plants near the country's western coast.

A Japanese firm has come up with the idea of constructing an array of solar cells around the Moon's equator to harvest solar energy and beam it back to Earth.

The Kagoshima Nanatsujima Mega Solar Power Plant, built by the electronics manufacturer Kyocera, boasts postcard views of Kagoshima Bay and Sakurajima volcano. It’s also Japan’s largest, with a capacity of 70 megawatts.

Less than three years after the disaster at a nuclear power plant in Fukushima, a hotly-anticipated floating offshore wind turbine began operating 20 kilometres from the damaged site on Monday.

New research conducted by NPD Solarbuzz and featured on their blog this past week shows that Japanese solar photovoltaic “PV” installations have now passed 10 GW for cumulative PV capacity, only the fifth country to reach the mark

The public authorities in Japan are putting all their efforts into establishing a new industry based on floating offshore wind turbines.

Japanese auto giant Toyota Motor Corp. has announced a new power management system that runs on batteries recycled from their Prius hybrid cars.