This is the best summary I could come up with:

The world’s biggest operational experimental nuclear fusion reactor – a technology in its infancy but billed by some as the answer to humanity’s future energy needs – has been inaugurated in Naka, Japan.

It is a joint project between the European Union and Japan, and is the forerunner for its big brother in France, the under-construction International Thermonuclear Experimental Reactor (ITER).

Researchers at ITER, which is over budget, behind schedule and facing major technical problems, hope to achieve nuclear fusion technology’s holy grail, net energy.

The EU energy commissioner, Kadri Simson, said the JT-60SA was “the most advanced tokamak in the world”, and called the start of operations “a milestone for fusion history”.

The US government called the result a “landmark achievement” in the quest for a source of unlimited, clean power and an end to reliance on carbon-emitting fossil fuels that cause climate change as well as geopolitical upheaval.

Unlike fission, fusion carries no risk of catastrophic nuclear accidents, such as the disaster in Fukushima in Japan in 2011, and produces far less radioactive waste than current power plants, its exponents say.

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