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Morita-Imashiro Lab
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The lab harnesses the power of ultrasound for motors and medicine.
AboutAbout the lab
Creating new value through acoustic engineering.
The Acoustic Creation Engineering Lab studies ultrasonic devices and their applications.
Many ultrasonic phenomena remain unexplained.
The lab conducts a wide range of research, from fundamental technologies such as proposing original ultrasonic transducers to applied research based on new ideas, with the aim of solving social challenges.
Its work includes motor control, surgical support robots, and the effects of ultrasound on cells.
Key terms
- Ultrasound
- Sound at a frequency so high that the human ear cannot hear it. It is used in many fields, including medicine, engineering, and chemistry.
- Ultrasonic motors
- A motor driven by ultrasonic vibration. It is compact and powerful, and operates without using magnetic fields.
- Transducer
- A component that vibrates in response to an electrical signal and produces sound such as ultrasound.
NewsLab news
Lecturer Imashiro receives the Graduate School of Engineering Houga Award
A student receives the Encouragement Award from the Japanese Society for Life Support Engineering
A student receives the Outstanding Student Award (Eiji Muto Award) from the Japan Society for Design Engineering
A doctoral student receives the Dean's Award of the Graduate School
A student receives the Encouragement Award at the USE2025 Symposium on Ultrasonic Electronics
ResearchResearch themes
The force generated by ultrasound is used in actuators, medical treatment, and cell control. The lab conducts a wide range of research, from fundamental technologies such as original ultrasonic transducers to applications based on new ideas, aiming to open up unexplored areas.
*Illustrative imageUltrasonic motors controlled by deep learning
The lab applies deep learning to ultrasonic motors, which are compact, powerful, and capable of precise motion, and has achieved control that keeps them operating properly even as temperature changes. It also studies estimating rotation speed from information such as current, which eliminates the need for a large sensor.
*Illustrative imageConveying a sense of touch in surgical robots
Using ultrasonic motors, the lab studies a mechanism for remote surgery robots that conveys to the surgeon's hand the force felt when a surgical instrument touches the affected area. With a system that conveys the gripping force of forceps, it reproduced the feel of soft objects.
*Illustrative imageTransducers for generating high-power ultrasound
The lab researches and develops transducers that generate high-power ultrasound, used in medicine, machining, and cleaning, at higher frequencies than before. By using structures that focus ultrasound with paraboloidal or ellipsoidal surfaces, they can emit strong ultrasound at multiple frequencies.
*Illustrative imageInvestigating how cells respond to ultrasound
The lab is developing a system that applies ultrasound to cultured cells while systematically varying the sound pressure and frequency. It measures changes such as intracellular calcium concentration in real time to investigate the conditions under which cells respond.
MembersFaculty
The members of the Acoustic Creation Engineering Lab consist of faculty, doctoral, master's, and undergraduate students, research students, and corporate and visiting researchers.As of 2026
- ProfessorTakeshi MoritaPublications ↗
- LecturerChikahiro ImashiroPublications ↗
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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: “Levitación acústica” Richard Haberkern / CC BY-SA 4.0 (cropped)
- Ultrasonic motors controlled by deep learning: “Ultrasonic motor” Yorkshire Terrier / Public domain (cropped)
- Conveying a sense of touch in surgical robots: “Debakey forceps” Phyo WP / CC BY-SA 4.0 (cropped)
- Transducers for generating high-power ultrasound: “Block-Sonotrode” Herrmann Ultraschalltechnik GmbH & Co. KG / CC BY-SA 4.0 (cropped)
- Investigating how cells respond to ultrasound: “Indian Muntjac fibroblast cells ( )” ZEISS Microscopy / CC BY 2.0 (cropped)
- Related lab (Kawakatsu Lab): “Atomic force microscope” Johannes Schneider / CC BY-SA 4.0 (cropped)
- Related lab (Mimura-Hosobata Lab): “SPring- img pano” en:User:Artorius / CC BY-SA 3.0 (cropped)
- Related lab (Takahashi-Michihata Lab): “Mechanical delay stage in an optical setup 01” Aksy88 / CC BY-SA 4.0 (cropped)
- Related lab (Kim Lab): “Meso reactor detail iX-factory without Logo” IX-factory STK / CC BY-SA 3.0 (cropped)
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