Total carbon dioxide emissions for fiscal year 2021 are 1,064 million tonnes.
Carbon dioxide reduction measures in the electricity, gas and transportation sectors would result in half of the 185 million tons of carbon dioxide emissions in the transportation sector, or 920,000 tons, being reduced by converting all fossil fuel vehicles to electric vehicles, as electric vehicles are twice as efficient as fossil fuel vehicles.
The energy conversion sector's 83.7 million tons will be reduced by eliminating thermal power generation and oil refining.
Subtracting these from the total emissions of 1,064.3 million tons leaves us with 888.6 million tons, which is equivalent to 1,931.4 billion kWh of electricity.
To achieve carbon neutrality, we need to 1,931.4 billion kWh of renewable energy.
Hydroelectric power generation can increase electricity by building small-scale hydroelectric power plants across the country that can be installed on small rivers, such as the 30kW Matsukuma Small Hydroelectric Power Plant, built in Yoshinogari Town in the eastern part of Saga Prefecture.
There is room for expansion of solar power generation on the roofs and parking lots of detached houses, public facilities, factories, supermarkets, convenience stores, and even on the premises of airports, ports, and railway stations.
The installation area calculated from the current solar power generation of 86.1 billion kWh is 0.25% of Japan's land area, but in order to generate the additional 1,931.4 billion kWh that is needed from renewable energy, the installation area would need to be 5.58% of Japan's land area.
There are plans to increase wind power generation by approximately 230 billion kWh, including both land-based and offshore generation.
With government subsidies, there are plans to double or triple geothermal power output by 2030, increasing it to 9 billion kWh.
Renewable energy source, livestock manure biomass gas power generation, can increase electricity generation to 7.02 billion kWh.
Increase electricity generation by 5.2 billion kWh through sewage sludge power generation, which emits carbon dioxide, and by 25.2 billion kWh through power generation using heat from incinerating general waste.
In factories, electricity consumption can be reduced by replacing electric boilers with heat generation unit boiler.
These has the potential to generate an additional 1,931.4 billion kWh of electricity needed to achieve carbon neutrality.
By implementing carbon dioxide reduction measures in the electricity, gas, and transportation sectors, it is possible to reduce carbon dioxide emissions below the amount that can be absorbed and removed by forests, thereby achieving carbon neutrality.
"Quote":URL of copyrighted work
"Greenhouse gas emissions and removals for fiscal year 2021 (Reiwa 3) (final figures1)"
https://www.env.go.jp/content/000128750.pdf
" Matsukuma Small Hydroelectric Power Plant, the smallest in Japan "
https://q0.io/research/matsuguma_01/