"Super-Kamiokande is the large water Cherenkov detector. The construction was started in 1991 and the observation began on April 1, 1996. The Super-Kamiokande is operated by an international collaboration of about 110 people and 30 institutes from Japan, the United States, Korea, China, Poland and Spain.
One of the purposes of the Super-Kamiokande experiment is to reveal the neutrino properties through the observation of solar neutrinos, atmospheric neutrinos, atmospheric neutrinos and man-made neutrinos. In 1998, from the observation of atmospheric neutrinos we discovered the neutrino oscillations which neutrinos are changing their types in flight. In 2001, solar neutrino oscillations were discovered by the observation of solar neutrinos. The investigation of the neutrino properties will enable us to understand how matter was created in the early universe. By observation of solar neutrinos, we can know the activities inside of the sun. By detection of neutrinos from supernova burst, we can investigate the details of the explosion mechanism of the star." Super-Kamiokande