Nuclear energy presents a paradox: it is low-carbon yet generates long-lived radioactive waste. In the context of Japan's nuclear revival, examine whether nuclear power can be a credible pillar of energy security and climate goals.

Q. Nuclear energy presents a paradox: it is low-carbon yet generates long-lived radioactive waste. In the context of Japan's nuclear revival, examine whether nuclear power can be a credible pillar of energy security and climate goals. (15 marks, 250-350 words)

Japan drew nearly 30% of its electricity from 54 reactors before the March 2011 Fukushima Daiichi accident, then shut them all down. Its Seventh Strategic Energy Plan, approved by the Cabinet in February 2025, reverses that stance and targets a 20% nuclear share by 2040 [1]. Japan's experience shows nuclear is a credible but strictly conditional pillar.

Energy security: the strongest case - Japan is resource-poor, importing about 90% of its energy; natural gas alone supplied 33% of generation in 2024 [2], leaving it exposed to LNG price shocks after the 2022 Ukraine war. - The restart of Kashiwazaki-Kariwa Unit 6 (1,356 MW) on 9 February 2026 could displace roughly 1.3 million tonnes of LNG imports annually; Japan now operates 15 reactors totalling 33 GW [2]. - Nuclear supplies firm baseload for rising demand from data centres, which renewables alone cannot yet guarantee.

Climate goals: aligned but not automatic - Nuclear's low lifecycle emissions underpin Japan's 2050 carbon-neutrality pledge; the plan pairs 40–50% renewables with 20% nuclear for a largely non-fossil mix by FY2040 [1]. - Post-2011 dependence on thermal power raised emissions, so restarts are partly a decarbonisation correction rather than a fresh gain.

The unresolved side of the paradox - No permanent geological repository has been sited; interim storage transfers risk to future generations — an inter-generational equity concern. - The ALPS-treated water discharge was judged consistent with international safety standards and of negligible radiological impact [3], yet still triggered trade and diplomatic friction — evidence of a persistent trust deficit. - Revival is slow: only 14 reactors restarted between 2011 and 2025 [4], each requiring local consent.

Nuclear can anchor energy security and climate action only when paired with independent regulation, transparent communication and a credible waste-disposal roadmap. Japan's calibrated, consent-based revival offers a useful template for India's own expansion of civil nuclear capacity, where similar low-carbon gains must be earned through public confidence.

(~325 words)

Sources: 1. Seventh Strategic Energy Plan, METI/Agency for Natural Resources and Energy (February 2025) — 20% nuclear share by 2040, renewables 40–50%, 2050 carbon neutrality 2. U.S. EIA, "Nuclear reactor restart in Japan will likely displace natural gas electricity generation" — Kashiwazaki-Kariwa Unit 6 restart (9 Feb 2026), 1,356 MW, ~1.3 Mt LNG displaced, gas at 33% of 2024 generation, 15 reactors/33 GW 3. IAEA Comprehensive Report on the Safety Review of the ALPS-Treated Water at Fukushima Daiichi (2023) — discharge consistent with IAEA safety standards, negligible radiological impact 4. U.S. EIA, "Since the 2011 Fukushima accident, Japan has restarted 14 nuclear reactors" — pace of restarts since 2011