My research explores the mathematical connections between quantum mechanical scattering, nonlinear waves, and seismic waves to understand how mathematical methods and analysis can potentially gain new insights and develop novel approaches.
Finding and understanding the mathematical connections that exist between different fields and phenomena is what makes mathematical research so fascinating.

The field of my research is part of the qualitative theory of ordinary differential equations. In this research, we focus on the behavior of all solutions of nonautonomous ordinary differential equations. How does the variable coefficients of ODE influence the stability of the solutions? The main purpose of this research is to answer this question. In particular, we deal with the problem on the stability in the Lyapunov sense. For example, we treat asymptotic stability, uniform asymptotic stability and exponential stability. By understanding these essence, we aim to contribute to the development of ODE.

Tsunami deposits are useful in attempted reconstructins of prehistoric tsunamis. Geological analyses of tsunami deposits can provide estimates of several parameters of tsunamis, such as recurrence intervals and inundation areas. To assess the history of paleotsunami, we investigate the tsunami deposits around the coastal lowlands on the eastern margin of the Sea of Japan. These studies provides useful information for advancing tsunami disaster risk assessment in coastal lowlands.
In addition, we are active in the practice of disaster education.

We focus on the ecology of wild animals, including endangerd species, and their function in the ecosystem using direct observation or research tools such as camera trap. We explore better conservation methods and way for a sustainable coexistence with people.

Studies on Control Strategy for Multi-body Systems
We can take each of the machines as a system that is composed of many parts including adjacent parts that are connected by a joint so that they can move relative to each other. We can typically assume that each part is rigid enough that it will never bend or twist while in motion. Such a part is called a rigid body. We can consider industrial robotic arms and even automobiles as systems with rigid bodies. When the rigid bodies in the system move, various forces are applied to the system from the inside. Then, we must ask, what is the relationship between the forces and the motions of the rigid bodies? In the control engineering laboratory, we study such problems for mechanical systems and try to control or measure the mechanical values of the system in order to obtain effective control methods.
Studies on Dynamic Mass Measurement
We also try to obtain effective estimation methods for some mechanical values of the system (including total mass) based on dynamics. Solving the problem of measuring the weights of heavy in-motion vehicles with high precision belongs to the field of dynamic mass measurement.

In the case of metal materials are machined, the surface of materials are plastic defomed. Cristal structure of metal surface is strained by plastic deformation. The crystal structure strain changes the chemical property of surface. This phenomenon is called a mechano-chemical reaction. We study the mechano-chemical reaction and the relationship of machining process and material property.

With the spread of Mobile Mapping System (a vehicle equipped with GNSS, laser scanners and cameras), huge point clouds are being accumulated rapidly. My study is to make effective use of this data in current road-related measurement system. And also I’m trying to display this as a high-speed 3DCG via the Internet.

Metaheuristic algorithms such as simulated annealing, iterated local search, genetic evolutionary algorithms are known to be effective optimization methods that can be used for various problems in engineering field. Our research interests are developments, improvements and analyses of high-performance evolutionary algorithms and metaheuristic algorithms based on local search for optimization problems such as Maximum Clique Problem, Graph Coloring Problem, Quadratic Assignment Problem, Facility Location Problem, Vehicle Routing Problem, Scheduling Problems, etc.

I am currently conducting researches on pedestrian flow modeling, simulation, and optimization. There are two reasons for investigating pedestrian flow. One is to solve the day-to-day problems of crowded public spaces, such as stations, shopping malls, pavements and many other places. The other is to optimize evacuation procedures from densely buildings and urban centers in case of an unpredicted event.

IT technologies are advancing at breakneck speed, driven in particular by advances in AI and IoT. While connecting vast amounts of information to the internet has enhanced convenience, it has also increased the risk of personal data and corporate confidential information being compromised. This laboratory focuses on securing IoT devices—which typically have limited computational resources and pose significant security challenges—and develops and implements security measures. We primarily concentrate on cryptography and random number generation, exploring applications of these technologies in IoT devices including FPGAs, as well as encryption for various communication channels and device authentication. Furthermore, we are committed to the real-world deployment of IoT technology.

In order to ensure safety during construction and to assure quality and performance of buildings, I am conducting research on methods to predict and to evaluate deformation of ground and structures accurately.
Also, to reduce cost, period, and environmental load of re-building, I am researching survey or evaluation methods of existing piles and foundation design reusing them.
In case of disasters such as earthquakes or heavy rains, I quickly survey on site, analyse the cause of damage, and utilise the results for subsequent disaster prevention and mitigation.

The way of manufacturing is undergoing major changes. One of the changes is co-creation. Development of a new manufacturing method beyond the gap between the creator and the user is a big challenge.
In my laboratory, I am studying a method to eliminate the barriers between creators and users as much as possible using Stress Index, Virtual Reality and so on. And we aim to construct a place where co-creation is possible.

The landscapes of traditional townscapes and villages are based on the natural conditions of the land, such as climate and topography, and are the tangible manifestations of social characteristics such as history and livelihoods, which have been inherited through traditional lifestyles and local traditions. In our laboratory, we are conducting research to clarify what kind of background has formed such a beautiful landscape, and what kind of elements it is composed of, fucusing on the characteristics of the traditional architecture of the region. We are also examining methods of heritage conservation that involve local residents in order to inherit these cultural heritages to future generations.

Study and practice on design methods of architecture in the context of urban space, public space, strategic urban regeneration by micro-intervention.
The main emphasis of my laboratory is to grasp architecture in the context of urban space and social situation, and use this for the basis for constructing both a new design theory and practical architectural projects.

Aiming to achieve both comfort and energy efficiency, which are essential for future architecture, we are conducting research to realize safe and healthy living spaces. Specifically, we are working to improve the efficiency of “air-based floor heating and cooling systems,” which excel at heating and cooling large spaces. We are also advancing research on environmental control utilizing natural energy and energy-saving renovations of existing buildings. Furthermore, we are working to improve the temperature and humidity environment of homes and reduce the air conditioning load through the development of “functional building materials” with moisture absorption and release and heat storage properties. Through these practical approaches using the optimal combination of air conditioning equipment and building materials, we are promoting research aimed at creating sustainable and high-quality buildings and living environments.

Using 3D scanners and photogrammetry, I conduct research on spatial design, preservation and utilization of architectural works designed by Le Corbusier and Kiyonori Kikutake, as well as cultural heritage sites in the Islamic regions such as Jordan.
My research also focuses on understanding the current state of cultural heritage/architecture as “living heritage,” as well as methods for their preservation and utilization.
Additionally, I am conducting practice-based research on community planning/development in collaboration with local governments and researching on Italian cities and architecture, with a particular focus on Venice.

Computer games have grown along with technology, incorporating various cutting-edge technologies. Among them, our research focuses on real-time rendering technology that supports interactivity and immersion, and networks that support connections with others. Through research on the mechanisms of getting hooked on games and social media, I would like to work on social contribution through games (education, community revitalization, aesthetics, public relations, etc.) and the role that games play in society.

There are many application fields for the development of rational methods for inferring desired information from observed data. One of the techniques is the alternating least squares method for decomposing a matrix. This method is used in a wide range of fields from analysis of psychological data to image processing. However, the theoretical background of this approach does not seem to be fully clarified. I am conducting research with various interests, centering on research to clarify the theoretical background of the alternating least squares method.

The theme of our laboratory is to measure biological information obtained from humans and animals. Measured biological information is used in the development of various sensors, equipment, and software.

Water hydraulic systems which use tap-water as working fluid are called aqua drive systems and they can realize novel green drive sources with 100% oil-free characteristics. In our laboratory, we study to realize a clean and safe system for rehabilitation, power assist, and life support. In addition, we have developed pure aqua drive systems, which can be driven without any power source, by controlling fluidic flow and have applied such systems to emergency drive sources and disaster prevention systems. We have also developed support systems to play musical instruments by only one hand.