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Katayose Lab
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The lab investigates cosmic phenomena through cosmic rays and cosmic gamma rays.
AboutAbout the lab
Exploring the universe and nature through radiation.
The Katayose Lab observes cosmic rays and cosmic gamma rays to study phenomena occurring in outer space and in celestial objects.
For observation, the lab uses a phenomenon called an "air shower," which cosmic rays create in the atmosphere.
The lab also develops radiation detectors and electronics for measuring cosmic rays, and conducts research through simulation.
On the lab's website, it is introduced under the name "Cosmic Ray Physics Lab."
Key terms
- Cosmic rays
- High-energy particles coming from celestial objects and space. Those from objects in the Galaxy are mainly atomic nuclei such as protons.
- Air shower
- A phenomenon in which many secondary particles, produced when a cosmic ray reacts with atomic nuclei in the atmosphere, rain down to the ground.
NewsLab news
Paper on the Tibet ASγ experiment published in Science Advances; press release issued
Paper on the CALET experiment published in Progress of Theoretical and Experimental Physics
Paper on the ALPACA experiment published in The Astrophysical Journal
Paper by a doctoral student published in Progress of Theoretical and Experimental Physics
Paper on the gamma-ray selection method of the Tibet ASγ experiment published in Progress of Theoretical and Experimental Physics
ResearchResearch themes
The lab observes high-energy radiation (cosmic rays) and cosmic gamma rays, which carry various kinds of information from the universe, to study phenomena occurring in outer space and in celestial objects. It uses air showers that cosmic rays create in the atmosphere for observation, and also conducts atmospheric physics research using them.
*Illustrative imageAir Shower Observation in Tibet
The lab observes air showers at the Yangbajing plateau (altitude 4,300 m) in Tibet. This is a collaboration (the Tibet ASγ Project) with universities across Japan, including the Institute for Cosmic Ray Research at the University of Tokyo, as well as the Chinese Academy of Sciences and Chinese universities.
*Illustrative imageNew Observation Experiment in Bolivia
Aiming to observe cosmic gamma rays and cosmic rays from the southern Galactic sky, the lab is carrying out a new observation experiment (the ALPACA Project) on the Chacaltaya plateau in Bolivia, in collaboration with research institutions in Japan, Bolivia, and Mexico.
*Illustrative imageDirect Observation on the Space Station
The lab also participates in an experiment on the space station (the CALET Project) that directly observes cosmic rays before they react with the atmosphere.
*Illustrative imageDetector Development and Simulation
The lab develops radiation detectors, analysis software, and electronics for observing cosmic rays. It also conducts research using Monte Carlo simulation.
MembersFaculty
Members of the Katayose Lab consist of faculty, master's and undergraduate students, and ROUTE students.As of 2026
- ProfessorYusaku Katayose
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Observatorio de Rayos Gamma HAWC 1” Marifer Veloz / CC BY-SA 4.0 (cropped)
- Air Shower Observation in Tibet: “Cosmic Ray Detector Units” Michaeltianhuili at English Wikipedia / Public domain (cropped)
- New Observation Experiment in Bolivia: “Chacaltaya, Bolivia” Bernard Gagnon / CC BY-SA 3.0 (cropped)
- Direct Observation on the Space Station: “STS-134 International Space Station after undocking” NASA / Public domain (cropped)
- Detector Development and Simulation: “Particle detector in revision” LSDSL / CC BY-SA 3.0 (cropped)
- Related lab (Minamino-Bronner Lab): “Groeeser.Hamamatsu.Photomultiplier” Bautsch / CC0 (cropped)
- Related lab (Kawamura Lab): “Muscovite structure 100” Kent G. Budge / CC0 (cropped)
- Related lab (Sato-Hiroshima Lab): “First neutrino observation” 作者不詳 / Public domain (cropped)
- Related lab (Raebiger Lab): “Coloured-transition-metal-solutions” No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims). / Public domain (cropped)
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