On February 23, 1987, just before 30 years from today, the neutrinos emitted from the supernova explosion SN1987A in the Large Magellanic Cloud, approximately 160,000 light-years away, reached the earth. Kamiokande, the predecessor detector of Super-Kamiokande, detected the 11 emitted neutrinos.

The Super-Kamiokande detector is located at 1000 meter underground in the Kamioka-mine, Hida-city, Gifu, Japan.The detector consists of a 50,000 tons stainless-steel water tank and about 11,000 photo sensors.

XMASS experiment aims to directly detect the cold dark matter using liquid Xenon (at about -100℃). Dark matter is unknown matter which is 5~6 times quantity of ordinary visible matter in the universe

Kamioka Observatory is an inter-university facility and has a large laboratory for the experimental physics located 1,000m underground of Kamioka-mine in Hida-city, Gifu. Many scientists are conducting leading researches such as Super-Kamiokande experiment in the underground laboratory.

The Hyper-Kamiokande experiment has been proposed as a successor of the Kamiokande and Super-Kamiokande aiming to explore unification of elementally particles and evolutionary history of the universe.


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