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Yamasaki Lab
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The lab uses mathematics to find the optimal shape of things.
AboutAbout the lab
Optimal shapes from mathematics, not intuition and experience.
The Yamasaki Lab conducts fundamental research on optimal design and applied research on its use in integrated systems and related fields.
Optimal design is the approach of mathematically defining design variables, an objective function, and constraints, and deriving the optimal design solution.
When design freedom is small, human intuition and experience can solve the problem, but as freedom grows, reaching the optimal solution becomes extremely difficult.
With "optimal design" as the keyword, the lab works on a wide range of targets, from integrated devices to automobiles.
Key terms
- Optimal design
- A method that expresses the values set in a design and an index of how good the design is as mathematical formulas, then finds the best design
- Topology optimization
- A structural optimal design method that starts from deciding where to place material and where to leave empty space, and searches for the shape itself
- Objective function
- An expression for the value to be maximized or minimized in a design, such as lightness or strength
NewsLab news
A paper from a joint research project in which Prof. Yamasaki participated was published in Journal of the Royal Society Interface
Prof. Yamasaki published a journal paper in Mechanical Engineering Journal
A student and Prof. Yamasaki published a journal paper in Structural and Multidisciplinary Optimization
A student and Prof. Yamasaki published a journal paper in Structural and Multidisciplinary Optimization
A student and Prof. Yamasaki published a journal paper in IEEE Transactions on Electromagnetic Compatibility
ResearchResearch themes
In today's world of constant global competition, manufacturing at companies is expected to be optimal, or at least to aim for optimality. Believing that optimal design, which goes beyond the limits of human thinking, can be a powerful weapon, the lab studies a broad range from fundamental methodology to applications.
*Illustrative imageOptimal design of integrated devices
The lab studies optimal design for various integrated devices, such as power semiconductor devices, optical semiconductor devices, and MEMS, aiming to greatly improve their performance.
*Illustrative imageOptimal design of automobiles
The lab views an automobile as an integrated system in a broad sense, including mechanical parts. It covers topology optimization of individual functional parts through to optimal design of subsystems that combine them.
*Illustrative imageFundamental methodology for optimal design
In strongly nonlinear problems, searching for solutions based on sensitivity information does not work. For such difficult problems, the lab proposes search methods that do not require sensitivity information, such as methods based on deep learning.
*Illustrative imageOptimal design inspired by living things
The lab considers the forms of living things to be a kind of optimal structure obtained over a long period of time through adaptation to the environment. It uncovers the principles of form generation through topology optimization and develops new optimal design methods from them.
MembersFaculty
The Yamasaki Lab consists of faculty members and doctoral and master's students.As of 2025
- ProfessorShintaro Yamasaki
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: “Steel truss bridge in Brazil” Henri Bergius from Finland / CC BY-SA 2.0 (cropped)
- Optimal design of integrated devices: “The internal view of a 2N3055 bipolar power transistor 01” Mister rf / CC BY-SA 4.0 (cropped)
- Optimal design of automobiles: “Formula Geely chassis” Ngchikit / CC BY-SA 3.0 (cropped)
- Fundamental methodology for optimal design: “Modelle von Flächen zweiter Ordnung nach A. Brill -Schilling, Cartonmodelle- (5)” Ramona Trusheim / CC BY-SA 3.0 (cropped)
- Optimal design inspired by living things: “Spongy bone - Trabecular bone 2 -- Smart-Servier” Laboratoires Servier / CC BY-SA 3.0 (cropped)
- Related lab (髙畑研究室): “Silicon Photonics 300mm wafer” Ehsanshahoseini / CC BY-SA 4.0 (cropped)
- Related lab (吉増研究室): “Compact AIS antenna” ESA – G. Porter / CC BY-SA 3.0 (cropped)
- Related lab (池橋研究室): “Microstructure1234” Denis Elbl, KIT / CC BY-SA 4.0 (cropped)
- Related lab (木村研究室): “1645RT2U-HD” ZeptoBars / CC BY 3.0 (cropped)
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