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Koseki-Ohnishi Lab
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The lab moves people and goods with electricity and control, studying railways, magnetic levitation, and more.
AboutAbout the lab
Moving people and objects through electricity and control
The Koseki-Ohnishi Lab studies the application of electrical engineering and electronics and information science to social systems such as transportation, including railway vehicles, magnetic levitation, and linear motors.
The lab also conducts theoretical research on control engineering and works on applying it in industry.
Learning control, system identification, mathematical optimization, and mechatronics form the core of its research.
The lab also covers wireless power transfer to electric vehicles and energy-saving railway operation.
Key terms
- Mechatronics
- A field of technology that combines machinery with electronic circuits and control to make machines move as intended
- Magnetic levitation
- Making an object float and supporting it without contact by using magnetic force. No friction or wear occurs
- System identification
- Building a mathematical model that describes how a target system behaves, based on actually measured data
NewsLab news
A student received the Excellent Paper Presentation Award at the Industry Applications Division Conference
A doctoral student received the Hiroshi Harashima Academic Encouragement Award from the Foundation for Promotion of Electrical, Electronic and Information Engineering
A student received a Third Prize Paper Award at the international conference IPEC2026
A student received the Industry Applications Division Excellent Paper Presentation Award
Master's students received the Graduate School of Engineering Dean's Award and the Excellent Master's Thesis Award, respectively
ResearchResearch themes
The lab applies electrical engineering and electronics and information science to social systems, with transportation as a main focus. Control engineering theory and its industrial applications are also a core pillar. The research is divided into four areas: wireless power transfer, linear drives, railways, and control systems.
*Illustrative imageWireless Power Transfer
This area covers wireless power transfer to electric vehicles. The lab studies a method for visualizing how power transfer characteristics change with compensation circuits so they can be designed systematically, as well as a method for detecting foreign metal objects that have fallen into the magnetic field.
*Illustrative imageMagnetic Levitation and Linear Drives
This area combines magnetic levitation, which supports objects without contact using magnetic force, with permanent magnet linear synchronous motors. The lab studies precise position control for factory transport systems and linear synchronous generators for wave power generation.
*Illustrative imageRailways
This area covers railway power supply and the way trains are operated. The lab studies wireless train control that keeps delays from spreading, energy-saving operation, and ways of using energy storage devices to make use of regenerative power.
*Illustrative imageControl Systems
This area covers high-precision positioning and the control of power supply circuits and pneumatic actuators. The lab studies data-driven design methods that cancel disturbances, and control methods that use adaptive identification.
MembersFaculty
The members of the Koseki-Ohnishi Lab are faculty, technical staff, project researchers, secretaries, collaborating researchers, doctoral and master's students, and undergraduate students working on their graduation theses.As of 2026
- ProfessorTakafumi KosekiPublications ↗
- Associate ProfessorWataru OhnishiPublications ↗
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: “The 'Maglev' - Japan's latest contribution to the ongoing quest for the reduction of travel times. ( )” Dom Pates / CC BY 2.0 (cropped)
- Wireless Power Transfer: “QI Coil 1” Nostrils.ua / CC BY-SA 4.0 (cropped)
- Magnetic Levitation and Linear Drives: “Linear Motor of Toei Ōedo Line” 作者不詳 / CC BY-SA 3.0 (cropped)
- Railways: “Railway catenary, Jasenovac” Mnalis / CC BY-SA 4.0 (cropped)
- Control Systems: “Pcontrol2” Hill.rick.c / CC BY-SA 4.0 (cropped)
- Related lab (Fujimoto-Shimizu-Gunji-Takano-Nguyen Lab): “Wheel hub motor of an electric kick scooter, sidepanel removed (2022)” Andrez1 / CC BY-SA 4.0 (cropped)
- Related lab (Baba Lab): “Transmission Lines at Sunset” Kkiefuik / CC BY 4.0 (cropped)
- Related lab (Ohya Lab): “Perovskite oxide thin film” Magnunor / CC BY-SA 4.0 (cropped)
- Related lab (Anh Lab): “Dilution Refrigerator ( )” UCL Mathematical & Physical Sciences from London, UK / CC BY 2.0 (cropped)
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