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Gravitational Wave (KAGRA) Lab
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The lab conducts gravitational wave experiments, detecting gravitational waves from space with KAGRA.
AboutAbout the lab
Detecting gravitational waves with KAGRA
The gravitational wave group at the Institute for Cosmic Ray Research aims at the direct observation of gravitational waves.
Gravitational waves are a phenomenon predicted by Einstein's general theory of relativity.
For many years, the lab has developed techniques for measuring extremely small changes in length with laser interferometer gravitational wave detectors.
With KAGRA, the large gravitational wave detector that resulted from this work, the lab aims to detect gravitational waves as part of an international observation network.
Key terms
- Gravitational waves
- Ripples in spacetime that propagate like waves. They are produced by events such as the merger of black holes.
- Laser interferometer
- A device that splits a laser beam in two, sends the halves back and forth, and measures tiny changes in length from how the returning beams overlap.
- General theory of relativity
- Einstein's theory that explains gravity as the curvature of spacetime.
ResearchResearch themes
The lab studies KAGRA, a laser interferometer gravitational wave detector, aiming at the direct observation of gravitational waves predicted by the general theory of relativity. Making use of extremely precise length measurement techniques, it also aims to observe the quantum mechanical behavior of large objects such as mirrors.
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MembersFaculty
The members of the Gravitational Wave Group are faculty members and students in the doctoral and master's programs.As of 2026
- ProfessorHideyuki Tagoshi
- ProfessorShinji MiyokiPublications ↗
- Associate ProfessorTakashi Uchiyama
- Associate ProfessorOsamu Miyakawa
- Assistant ProfessorTakahiro Yamamoto
- Assistant ProfessorTakaaki Yokozawa
- Assistant ProfessorShoichi Oshino
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: “Initial Virgo mirror” Jérôme Degallaix / CC BY-SA 4.0 (cropped)
- Observing gravitational waves with KAGRA: “In-construction KAGRA gravitational-wave detector” Christopher Berry / CC BY-SA 4.0 (cropped)
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