Press Release 2024.1.18

M87* One Year Later:
Proof of a persistent black hole shadow

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Press Release 2023.12.22

The Cosmic Dawn
was Brighter Than

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Press Release 2023.12.4

The James Webb Space Telescope discovered
numerous supermassive black holes
in the distant universe

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Press Release 2023.11.9

The Oxygen Mystery
in the Early Universe:
Unveiling a Rapid Increase

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Press Release 2023.9.28

Two-decade monitoring of M87
unveils a precessing jet
connecting to a spinning black hole

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Press Release 2023.4.26

Astronomers image for the first time
a black hole’s accretion flow
together with a powerful jet

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Press Release 2023.2.11

MAGIC Telescopes scrutinize
the center of our home Galaxy
for fingerprints of dark matter

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Press Release 2022.5.12

Astronomers reveal
first image of the black hole
at the heart of our galaxy

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A video clip that features experimental facilities of ICRR, in Hida city, Japan, Utah, USA and LaParma, Canary Islands, Spain



A 360 panoramic view exploring ICRR experimental facilities, Super-Kamiokande and KAGRA located underground in Kamioka Mine, Japan



Hyper-Kamiokande is the next generation large-scale experiment for the study of neutrinos and nucleon decays. The Hyper-Kamiokande project was started in February 2020 and aims to…



Neutrino Researches at the Super-Kamiokande explained by Professor Masayuki Nakahata, Director of Kamioka Observatory, ICRR


Telescope Array

Professor Hiroyuki Sagawa of ICRR explains the Telescope Array project that aims to detect ultra-high-energy cosmic rays at Utah, USA



Professor Masahiro Teshima of ICRR explains CTA project that aims to detect high-energy gamma rays from outer space by ground-based telescope



Professor and Director of KAGRA Observatory Masatake Ohashi explains KAGRA project which aims to contribute to explore the gravitational wave astronomy.

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Research Projects

Neutrino And Astroparticle Division


Super-Kamiokande aims to reveal the Universe’s history and to explore the nature of elementary particles through the observation of neutrinos and a discovery of proton decay.

High Energy Cosmic Ray Division

Telescope Array(TA)

Aiming at highest energy cosmic ray physics by detecting weak light from atmosphere.

Astrophysics And Gravity Division

Gravitational Wave

We aim to promote gravitational wave astronomy by participating the world gravitational wave observation network with the large-scale cryogenic gravitational wave telescope, KAGRA.

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The Institute for Cosmic Ray Research (ICRR) conducts observations and studies cosmic rays from various aspects. Its predecessor was a lodge for research, called Asahi Hut, built on Mt.Norikura based on an Asahi Academic Grant. In 1953, it was transformed into the Cosmic Ray Observatory of The University of Tokyo.

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