The transport sector is one of the main sources of global GHG emissions, of which road transport emissions are greatest. The decarbonisation of road transport requires systemic changes combined with technological interventions to optimise the use of transport modes. Given the diverse options for road transport decarbonisation due to differences in technological development and commercialisation levels across geographies, interventions that lead to local development or contribute to addressing societal challenges at each locality are warranted. The decarbonisation of mobility can lead to widespread structural change and should be seen not only as a contribution to addressing the grave problem of the climate crisis, but also as an opportunity to realise a prosperous society with mobility for all.

The Japanese automobile industry has recovered from the post-war chaos, and Japan, which has no resources, has grown rapidly as an "energy-saving manufacturing industry." Japanese engineers, who are good at exchanging ideas and coordinating with each other, have developed a world-class automobile by maximizing the energy and resources given to them. Now, the vision of shifting to carbon neutrality right away has taken shape from the idea of energy conservation. It is not so simple that "post-energy saving" can be called "carbon neutrality," and it is necessary to deepen our understanding of renewable energy. However, this paper does not discuss energy, but examines the current position and future prospects of electric vehicles, which are expected to utilize renewable energy.

Currently, the electrification and energy (electric power) system revolutions are progressing simultaneously in the automotive industry. The purpose of this paper is to discuss the use of electric vehicles (EVs) not only for transportation, but also for household and community energy management. Smart charging and discharging of EVs can contribute to reducing electricity costs and stabilizing the electricity supply. This paper introduces research cases related to the utilization of EVs in smart grids, which are IT-based power transmission and distribution systems, and social implementation efforts in Japan and abroad.

Contactless power transmission is a system that relies on a variety of elemental technologies. It is called contactless power supply (charging), wireless power transmission, wireless power supply (charging), wireless power transfer, and various other names, and shortened to WPT (wireless power transfer, wireless power transmission), CPS (contactless power transmission), and various other abbreviations. Unifying all of these under the single name "contactless power transmission," this paper explains how the technology's history to date and fusion of a wide range of technical areas guarantee that it will contribute to conserving energy, and achieve practical applications.

In October 2021, the International Air Transport Association (IATA) passed a resolution to achieve net-zero greenhouse gas emissions by 2050, accelerating the movement toward carbon neutrality in the aviation sector. In Japan, in order to achieve this goal, R&D programs have been initiated in line with the Green Growth Strategy, and industry, government, and academia are working together to promote development. This paper reviews the domestic and international trends in the above topics and the development status of SAF, hydrogen aircraft, and electrified aircraft that use electric propulsion systems.

In order to meet the government's goal of carbon neutrality by 2050, there are calls for efforts toward achieving early decarbonization at ports and harbors, which are centers of both international logistics and substantial energy consumption. Ministry of Land, Infrastructure, Transport and Tourism's Ports and Harbours Bureau is currently working toward forming Carbon Neutral Ports (CNPs), and similar moves are underway nationwide. This paper reports the current situation regarding deliberations toward forming CNPs, and looks at what directions future efforts might take.

In recent years, the automotive industry has been hit by a series of extremely large waves: the CASE Revolution, which has been described as a once-in-a-century revolution; the decarbonization trend; and countries no longer using Russian energy sources due to its invasion of Ukraine. The decarbonization trend is distinct from conventional global warming policies, and in the author's opinion, the auto industry is the main focus of decarbonization—in fact, decarbonization also means “de-petroleum-ization.” In preparation for the coming “post-oil era,” transportation and automobile industry policies will hopefully be discussed from the perspective of energy supply.