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Yashiro-Kamezawa-Fenner Lab
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A lab that uses X-rays to explore the unknown 4D world.
AboutAbout the lab
Come explore the frontier of the 4D world.
The Yashiro Lab develops X-ray imaging technologies that go beyond previous limits.
We live in a 4D world made up of three dimensions of space and time, but at scales below a micrometer and below a millisecond lies an unknown world that even cutting-edge measurement cannot reach.
The lab uses the quantum nature of high-energy beams, such as those from the high-brilliance synchrotron radiation facility NanoTerasu and medical X-ray sources, and combines it with micro/nano-fabrication and data science techniques.
With new measurement technologies, the lab takes on the challenge of opening up the uncharted 4D world.
Key terms
- Synchrotron radiation
- Extremely bright X-rays emitted when electrons traveling at nearly the speed of light are bent. It is produced at large accelerator facilities.
- X-ray CT
- A method of reconstructing the inside of an object in three dimensions from images taken by shining X-rays from various directions.
- Compressed sensing
- A data science technique that computationally extracts the necessary information from a small amount of measurement data.
NewsLab news
A master's student won first place at SSEN Hackathon 2026
Prof. Yashiro and colleagues received the Excellence Award for Outstanding Utilization Results from the Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM)
A master's student received the Department Chair's Award of the Department of Finemechanics
Received the 46th (FY2024) Japan Society of Applied Physics Outstanding Paper Award
A student team won the top prize at the Tohoku University Business Idea Contest 2024
ResearchResearch themes
The lab builds new imaging technologies by combining the quantum nature of high-energy beams such as X-rays with micro/nano-fabrication and data science. It aims to open up an unknown domain: 4D spatiotemporal scales below a millisecond and below a micrometer.
*Illustrative imageMillisecond 4D X-ray CT
The lab has succeeded in X-ray CT with millisecond time resolution, a world first. Using an optical element that splits synchrotron radiation into multiple beams together with compressed sensing, it has also demonstrated X-ray CT in 1 millisecond without rotating the sample.
*Illustrative imageX-ray Elastography
The lab is developing X-ray imaging techniques that visualize the distribution of elastic modulus inside a sample at high spatial resolution. Applications are expected in medical diagnosis and research on functional soft materials.
*Illustrative imageOptics for X-rays and Neutrons
Using advanced micro/nano-fabrication, the lab develops optical elements to realize X-ray imaging and neutron imaging that go beyond previous limits.
*Illustrative imagePioneering New Modalities
The lab is taking on new measurement methods that use quantum phenomena, such as combining X-ray structural analysis of surfaces and interfaces with imaging by advanced X-ray interferometers to visualize the spatial distribution of structural parameters.
MembersFaculty
The Yashiro Lab's members consist of faculty, technical staff, technical assistants, doctoral, master's, and undergraduate students, and short-term visiting students.As of 2026
- ProfessorWataru Yashiro
- LecturerRyosuke Ueda
- Assistant ProfessorChika Kamezawa
- Assistant ProfessorStephen Stapleton Fenner
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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: “US Navy 060510-N-3532C-008 The Computerized Tomography (CT) scan machine aboard the Military Sealift Command hospital ship USNS Mercy (T-AH 19) uses x-rays and computers to create cross-sections of bodily tissues” U.S. Navy photo by Journalist Seaman Joseph Caballero / Public domain (cropped)
- Millisecond 4D X-ray CT: “X-ray Computed Tomography of Astromaterials -- jsc2024e076997” NASA Johnson Space Center / ROBERT MARKOWITZ NASA-JSC / Public domain (cropped)
- X-ray Elastography: “EROSITA X-ray detectors” JohannesBuchner / CC BY-SA 4.0 (cropped)
- Optics for X-rays and Neutrons: “Diffraction-red laser-diffraction grating PNr°0126” D-Kuru / CC BY-SA 3.0 at (cropped)
- Pioneering New Modalities: “Aust.-Synchrotron-Soft-X-ray-Beamline-Experimental-Station” jjron / CC BY-SA 3.0 (cropped)
- Related lab (Chiba-Nomura (Hikaru) Lab): “Hitachi-7100-transmission-electron-microscope-equipped-with-a-gatan-high-resolution-digital-bottom-mount-camera-3-1024x683” Oak tree road 1 / CC BY-SA 4.0 (cropped)
- Related lab (Tanaka-Vergara-Guo Lab): “AE National Semiconductor B9212 GAL16V8QS-25QNC c AST B AD” Epop / CC BY-SA 3.0 (cropped)
- Related lab (Tsukamoto Lab): “Integrated-circuit-open” 作者不詳 / Public domain (cropped)
- Related lab (Okabe-Ryuzono-Mishima Lab): “" 13 Fiat-Chrysler - Safety - Carbon Fiber Composite Roof Assembly SRT Viper capote” spe.automotive / CC BY 2.0 it (cropped)
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