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Hyper-Kamiokande Underground Neutrino Observatory in Japan Unveils 94-Meter Cavern in Gifu Pref., Ahead of 2028 Opening

HIDA, Gifu — The underground cavern for the next-generation neutrino observatory Hyper-Kamiokande in Hida, Gifu Prefecture, was opened the press for the first time on Saturday.

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On the 28th, the Institute for Cosmic Ray Research at the University of Tokyo unveiled the giant cavity of Hyper-Kamiokande, a next-generation observation device to be built in Kamioka, Hida City, Gifu Prefecture. It is said to be one of the largest underground man-made cavities in the world. Excavation work is scheduled to be completed in July, after which water tanks and ultra-sensitive optical sensors to measure neutrinos, a type of elementar…

·Japan
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On the 28th, the Institute for Cosmic Ray Research at the University of Tokyo opened to the press a huge cavity that had been excavated into the mountains of Hida City, Gifu Prefecture, to house Hyper-Kamiokande, a next-generation observational device that will delve into the mysteries of the universe through the observation of the elementary particle neutrino.

·Japan
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Nikkei broke the news in Japan on Saturday, June 28, 2025.
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