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1950
Asahi Hut (wooden structure; about 50 sq. meters) was constructed on Mt. Norikura based on the Asahi Bounty for Science.
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August 29, 1955
The main building and research facilities of the Norikura Observatory were constructed.
1957
The Norikura Observatory participated in IGY (International Geophysical Year) activities, and began air shower observation.
1958
The emulsion chambers at Norikura Observatory started operation.
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1959
Air shower observation started at the Institute for Nuclear Study, The University of Tokyo.
1960
The Emulsion Section of the Institute for Nuclear Study, The University of Tokyo, developed a large-size balloon.
1968
The Emulsion Section of the Institute for Nuclear Study, The University of Tokyo, started observation on Mt. Fuji with emulsion chambers.
1972
The construction of MUTRON was commenced.
1975
MUTRON was completed.
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1975
The construction of the Akeno Observatory started.
April 18, 1977
The Akeno observatory was established as one of the ICRR facilities.
October 6, 1978
The Akeno Observatory performed the opening ceremony.
1979
The Akeno 1km2 air shower detector was completed.
1979
The special facility for emulsion chamber on Mt. Fuji was constructed.
1981
Japan-China joint research on emulsion chamber observations started.
1983
The primary cosmic ray research facility (i.e. massspectrometer etc.) was installed.
1987
The construction of the wide-area air shower detector, AGASA, started at the Akeno Observatory.
September 29, 1989
A significant increase of cosmic ray intensity coincident with a solar flare was observed at the Norikura Observatory.
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1990
The wide area air shower detector, AGASA, was completed at Akeno Observatory.
1993
The construction of air shower gamma rays detector in Tibet started.
1994
A giant air shower with energy of 2×1020 eV was observed at Akeno Observatory.
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1997
The air shower gamma ray detector in Tibet was completed.
2003
The construction of the Telescope Array was commenced.
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2008
The Telescope Array experiment started observation.
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December 2018
The 10th anniversary ceremony of Telescope Array Project was held in Kashiwa Campus, The University of Tokyo.
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February 2019
Extended construction of Telescope Array Project began in Utah State, USA (TAx4) .
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April 2021
The highest energy gamma rays from the Galactic disk was detected by Tibet ASγ experiment: Evidence for the existance of Pevatrons in our Galaxy.
Asahi Hut (wooden structure; about 50 sq. meters) was constructed on Mt. Norikura based on the Asahi Bounty for Science.
1950
Previous
Date
Asahi Hut (wooden structure; about 50 sq. meters) was constructed on Mt. Norikura based on the Asahi Bounty for Science.
The main building and research facilities of the Norikura Observatory were constructed.
The Norikura Observatory participated in IGY (International Geophysical Year) activities, and began air shower observation.
The emulsion chambers at Norikura Observatory started operation.
Air shower observation started at the Institute for Nuclear Study, The University of Tokyo.
The Emulsion Section of the Institute for Nuclear Study, The University of Tokyo, developed a large-size balloon.
The Emulsion Section of the Institute for Nuclear Study, The University of Tokyo, started observation on Mt. Fuji with emulsion chambers.
The construction of MUTRON was commenced.
MUTRON was completed.
The construction of the Akeno Observatory started.
The Akeno observatory was established as one of the ICRR facilities.
The Akeno Observatory performed the opening ceremony.
The Akeno 1km2 air shower detector was completed.
The special facility for emulsion chamber on Mt. Fuji was constructed.
Japan-China joint research on emulsion chamber observations started.
The primary cosmic ray research facility (i.e. massspectrometer etc.) was installed.
The construction of the wide-area air shower detector, AGASA, started at the Akeno Observatory.
A significant increase of cosmic ray intensity coincident with a solar flare was observed at the Norikura Observatory.
The wide area air shower detector, AGASA, was completed at Akeno Observatory.
The construction of air shower gamma rays detector in Tibet started.
A giant air shower with energy of 2×1020 eV was observed at Akeno Observatory.
The air shower gamma ray detector in Tibet was completed.
The construction of the Telescope Array was commenced.
The Telescope Array experiment started observation.
The 10th anniversary ceremony of Telescope Array Project was held in Kashiwa Campus, The University of Tokyo.
Extended construction of Telescope Array Project began in Utah State, USA (TAx4) .
The highest energy gamma rays from the Galactic disk was detected by Tibet ASγ experiment: Evidence for the existance of Pevatrons in our Galaxy.
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