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China Raises Nuclear Concerns Over Japan’s Plutonium Stockpile

China Raises Nuclear Concerns Over Japan’s Plutonium Stockpile
'No longer a fantasy': China claims Japan has enough plutonium for 5,500 nuclear warheads · wionews.com

China says Japan has a very large amount of plutonium from nuclear energy activities.

A Chinese ambassador said the separated plutonium could theoretically make about 5,500 nuclear warheads.

He also said Japan has more plutonium in spent nuclear fuel that has not yet been extracted.

China argues that Japan’s technology and growing military capabilities could let it change its defence policy quickly.

Japan says it follows rules that prohibit possessing, producing, or introducing nuclear weapons.

Japan also says its nuclear research and energy use are only for peaceful purposes.

The two countries are arguing about Japan’s military expansion and China’s military activities.

The plutonium figures have appeared in Chinese criticism before.

The claims describe a theoretical capability, not a statement that Japan is building nuclear weapons.

Key facts

Separated plutonium
Japan reportedly had 44.4 tonnes at the end of 2024.
Theoretical warhead estimate
China’s ambassador said the stockpile could support around 5,500 nuclear warheads.
Unextracted plutonium
Japan’s spent-fuel storage facilities reportedly contained another 191 tonnes.
Japan’s stated policy
The Three Non-Nuclear Principles prohibit possessing, producing, or allowing the introduction of nuclear weapons.
Japan’s nuclear-use position
Japan said its research, development, and use of nuclear energy are exclusively peaceful.
Earlier Chinese report
PLA Daily cited the same 44.4-tonne figure in March 2026.
Defence developments cited
Chinese criticism referred to Japan’s long-range weapons, missile defence, advanced military technology, and cooperation with the United States.

Quotes

Zhang Hanhui

Chinese Ambassador to Russia

“If Japan has the will and the necessary capabilities, its transformation into a nuclear power no longer looks like a fantasy.”
wionews.com

Tomiko Ichikawa

Japan’s ambassador to the Conference on Disarmament

“Japan has been limiting its research, development and use of nuclear energy exclusively for peaceful purposes.”
wionews.com

Sources

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