This winter Japan is as soon as once more asking households and firms to preserve electrical energy because the nation braces for falling temperatures. “Heat biz,” the federal government’s newest marketing campaign, encourages residents to decorate warmly in turtlenecks and sweaters in an effort to stop blackouts.

Final March, for the primary time in seven years, residents have been urged to curb energy consumption amid a world vitality squeeze and colder climate attributed to the La Nina climate phenomenon. By summertime, Japan narrowly averted energy outages.

Regardless of pledging to decarbonize the economic system by means of renewables and the nation’s centerpiece hydrogen vitality technique, Japan is pivoting again to nuclear energy in an try to regain some vitality independence. Nuclear energy has historically been Japan’s primary low carbon vitality supply. However within the aftermath of the Fukushima nuclear catastrophe in 2011, anti-nuclear energy sentiment gripped Japan. In response, the federal government shut down all 54 nuclear reactors and commenced phasing out nuclear energy from the full vitality combine. At present, solely 9 are operational.

Now hovering vitality prices have prompted the federal government to increase the 60-year working restrict for nuclear reactors and develop next-generation reactors to interchange them. In doing so, Japan follows Europe and the US, which have prolonged the lifetime of nuclear reactors so long as security checks are handed.

In line with Japan’s newest nuclear vitality coverage, “nuclear energy serves an necessary function as a carbon free baseload vitality supply in reaching provide stability and carbon neutrality.” That indicators a serious shift within the nation’s temper towards nuclear vitality.

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Earlier than the Fukushima nuclear accident, nuclear energy accounted for 30 p.c of Japan’s vitality wants; as of March 2021, the share of nuclear energy had plunged to simply 3.9 p.c.  However the authorities is now in search of to spice up the determine to as a lot as 22 p.c by 2030, which would require some 27 operational nuclear reactors. Subsequent summer season, the federal government goals so as to add seven reactors again into operation. However some consultants are uncertain whether or not the extra nuclear reactors can go the stricter security checks by 2030. In the meantime, the development of subsequent technology nuclear reactors will start in 2030, although it’s prone to take some 10 years earlier than they develop into totally operational.

Japan is strolling an vitality tightrope in the long run in addition to quick time period. In fiscal 12 months 2021 Japan’s vitality self-sufficiency fee stood at 13.4 p.c – decrease than many different developed international locations. Japan’s electrical energy reserve ratio, which signifies its electrical energy surplus, is anticipated to fall under the three p.c minimal wanted for a secure provide. This implies a small to medium-sized thermal energy plant may cause a blackout ought to demand outstrip provide.

Whereas some consultants imagine the promotion of nuclear energy crops has develop into a drag on the introduction of renewable vitality, the federal government has additionally been actively selling the event of solar energy and offshore wind energy. It goals to double photo voltaic and wind technology by 2030. Final 12 months, the Tokyo metropolitan authorities introduced a obligatory photo voltaic panel mandate on new properties constructed after fiscal 12 months 2025.

However a serious impediment is manufacturing commercially viable backup storage batteries. Japan’s mountainous topography and restricted solar publicity throughout winter make batteries important to increasing weather-dependent renewable vitality sources.

Nuclear energy and coal fired energy crops have been a secure supply of baseload energy. However in recent times, LNG energy crops haven’t solely supplemented unstable sources of renewable vitality however have additionally taken on a task as a baseload energy supply, making Japan extra depending on LNG imports. For a few years, the value of LNG has remained persistently low. However the provide of LNG has modified dramatically since Russia’s invasion of Ukraine. Japan is dependent upon Russia for roughly 9 p.c of its LNG imports. Its geographic proximity is a bonus since LNG can solely be saved for 2 weeks and have to be constantly sourced.

Japan has pinned its hopes on hydrogen as a clear and greener approach to obtain internet carbon zero. It has plans to determine Japan as a world hydrogen hub, however at present hydrogen vitality stays considerably costlier than fossil gasoline options. Whereas hydrogen doesn’t emit carbon dioxide when used as vitality, it’s known as an “vitality provider” as vitality is required to supply it. What’s extra, Japan’s ambiguous definition of “clear” hydrogen additionally lumps collectively “blue” hydrogen vitality – generated from fossil fuels – and “inexperienced” hydrogen derived from renewable sources. There are considerations that hydrogen vitality may thus play a task in sustaining fossil fuels.

Japan’s low vitality provide capability stems from the simultaneous exit of outdated thermal energy crops below the federal government’s technique to attain internet zero emissions by 2050, and the delay in restarting nuclear energy crops. It’s also a results of Japan’s push to decontrol the electrical energy trade and electrical energy retail sector within the aftermath of the 2011 Fukushima nuclear accident. The entry of recent energy suppliers has created a state of affairs the place it’s cheaper for main energy corporations to supply electrical energy from the retail market than to generate it.

With electrical energy charges rising to document ranges, the federal government’s resolution to revive nuclear vitality in its Clear Power Technique is claimed to have been devised in simply 4 months. The transfer to interchange growing older reactors with new technology fashions will commit the natural-disaster inclined nation to counting on nuclear energy for generations to return, with restricted debate round financial effectivity and public approval.