| -EHE Inter. Workshop -Public Lecture "Neutrino"(j.) |
| History |
| Chronology |
| Organization |
| Number of staff & Directors |
| Finances (j.) |
 |
| Facilities |
| -Kashiwa Campus -Kamioka -Norikura -Akeno |
| Library(j.) Computer system(j.) Clerk Office(j.) Seminar Room(j.) |
| Showa25 | 1950 | The Asahi hut (50m2 wooden) was built on Mt.Norikura with the Asahi Bounty for Science. |
| Showa28 | 1953 | The Asahi hut developed into the Cosmic Ray Observatory, University of Tokyo (1 Aug). |
| Showa30 | 1955 | The main building and research facilities of the Norikura Observatory were built (with the opening ceremony on 29 Aug). |
| Showa31 | 1956 | -- The Cosmic Ray Division (composed of Air Shower group and Emulsion group) of Institute for Nuclear Study, University of Tokyo, began. |
| Showa32 | 1957 | The Norikura Observatory participated in IGY (international Geophysical Year) activities, and began the air shower observation. |
| Showa33 | 1958 | The emulsion chamber on Norikura started operation. |
| Showa34 | 1959 | -- Institute for Nuclear Study started observation of air showers. |
| Showa35 | 1960 | -- The Emulsion group of Institute for Nuclear Study developed
large-size baloon. -- The overseas special project (: international collaborations in India, Brazil and Bolivia) of the Japan Society for the Promotion of Science began. |
| Showa41 | 1966 | -- The baloon project of Emulsion group of Institute for Nuclear Study, University of Tokyo, was transferred to the Institute of Space and Aeronautical Science, University of Tokyo. |
| Showa43 | 1968 | -- The emulsion group of Institute for Nuclear Study started cosmic ray observation on Mt.Fuji with the emulsion chamber. |
| Showa47 | 1972 |
The full-time director was posted. Construction of MUTRON started. -- The cosmic dust group in the Cosmic Ray Division of Institute for Nuclear Study was established. |
| Showa48 | 1973 | The ultra-high energy weak interation division was established. The overseas special project (: International collaborations in India, Brazil and Bolivia) was transferred from the Japan Society for the Promotion of Science. |
| Showa49 | 1974 | The full-time chief clerk was posted. |
| Showa50 | 1975 | MUTRON was completed. Construction of the Akeno Observatory started. The ultra-high energy strong interaction division was established. |
| Showa51 | 1976 | Institute for Cosmic Ray Research was established (25 Aug); The ultra-high energy strong interation division was divided into the first and the second divisions, and the three divisions (muon measurement, experimental meson physics and cosmic ray study) were transferred from Institute for Nuclear Study, University of Tokyo. Resultantly the Institute was composed of six divisions and one observatory. |
| Showa52 | 1977 | The Akeno observatory became an attached institution (18 Apr). |
| Showa53 | 1978 | The Akeno Observatory performed the opening ceremony (6 Oct). |
| Showa54 | 1979 | The Akeno 1km2 air shower detector was completed. The special facility for emulsion chamber at Mt.Fuji was constructed. The 16th International Cosmic Ray Conference was held in Kyoto (Aug). |
| Showa56 | 1981 | Japan-China collaboration on the experiments using emulsion chambers began. |
| Showa57 | 1982 | The division of cosmic ray detections (for guest staff) was estabblished. |
| Showa58 | 1983 | The collaboration on the nucleon decay experiment at the Kamioka
mine began. The facilities (i.e. mass spectrometer etc.) for the research of the primary cosmic rays were installed. |
| Showa61 | 1986 | The small committee for the future plan examination (I) was organized. |
| Showa62 | 1987 | The underground detector at Kamioka observed neutrino burst from
the supernova for the first time in the world. Construction of the 100km2 wide area air shower detector, named AGASA, at the Akeno Observatory was started. The report from the small committee for the future plan examination (I) was submitted. |
| Showa63 | 1988 | The underground detector at Kamioka observed the deficit of neutrino flux from the sun. |
| Heisei01 | 1989 | The large increases of neutrons due to a solar flare were observed at the Norikura Observatory (26 Sep). |
| Heisei02 | 1990 | The 100km2 wide area air shower detector, AGASA, was completed at Akeno. |
| Heisei03 | 1991 | Construction of Super-Kamiokande began. The small committee for the future plan examination (II) was organized. |
| Heisei04 | 1992 | The division of the neutrino astrophysics was established and the
division of the cosmic ray detections (for guest staff) was closed. The gravitational wave group joined (belonging to the muon measurement division) The cangaroo project in Australia started, and observed TeV gamma rays from a pulsar (PSR1706-44). |
| Heisei05 | 1993 | Construction of air shower gamma ray detector in Tibet began. |
| Heisei06 | 1994 | The computer house was built at Kamioka (Jan). The digging of a cave for SuperKamiokande was finished (Jun). A giant air shower with energy of 2×1020 eV was observed at Akeno The evaluation of the Institute achievements by outsiders was carried out. The anormalous zenith angle dependence of the atmospheric neutrinos was observed at Kamioka. |
| Heisei07 | 1995 | The division of the neutrino astrophysics was abolished and the
Kamioka Observatory for the cosmic elementary particle research was
established (1 Apr) The completion ceremony of Super-Kamiokande was held before filling water (Nov). |
| Heisei08 | 1996 | The full-scale operation of Super-Kamiokande began (1 Apr) |
| Heisei09 | 1997 | The air shower gamma ray detector in Tibet was completed. |
| Heisei10 | 1998 | The discovery of finite neutrino masses by Super-Kamiokande was
officially announced (5 Jun). Construction of the Kashiwa campus started (Nov). |
| Heisei11 | 1999 | The Research Center for Cosmic Neutrinos was established (1 Apr). The Cangaroo project 2 began in Australia. Preparation of the Cangaroo project 3 began in Australia. |
