Research Summary
My research focuses on the spread of the invasive beetle Aromia bungii, known in Japan as “クビアカツヤカミキリ” or “kubi-aka-kamikiri”. This species poses a major threat to the Rosaceae family, particularly cherry blossom trees. First detected in the port area of Aichi Prefecture in 2012, it likely arrived through wood transport or nursery imports. Despite its economic impact in Japan, Germany, and Italy, limited studies have examined its local-scale dispersal. My research integrates key geographical variables into an ecological model to simulate its spread using a deep learning approach. The findings will aid in pest management strategies, helping to predict and mitigate future outbreaks effectively.

Impression of SU and Japan
I first came to Saitama University in October 2022, after Japan reopened its borders. While visiting my brother in Chiba, I contacted the university's Foreign Office and submitted a proposal to a potential supervisor with Ms. Inomori's help. I remember the beautiful autumn scenery around the university, feeling relieved (安心 or anshin). I believed it was the perfect place for my PhD journey, despite the challenges ahead. After living in Europe for two years, I wanted to experience life in an Asian country rich in culture and tradition. Japan was ideal. Hanami, a cultural tradition, reflects life's fleeting nature, as expressed in the saying 人間の一生は桜のように儚い (ningen no isshō wa sakura no yō ni hakanai). This phrase reminds me that life is precious. I am committed to preserving hanami's cultural significance for future generations through my research.

Research Summary
My research is the weight perception in Virtual Reality. The research aims to know about different vibrations for weight perception in Virtual Reality. The reason for weight perception isn’t perceived by looking, touching or lifting objects. Vibration can get weight perception but using only vibration may not be enough for perception, so I used Pseudo Haptic technique combined with vibration for enhancing to the weight perception. However, I used the two techniques but in the real world I would like to know about the real vibrate when water dripping in the bottle for applying to test in Virtual Reality.

Impression of SU and Japan
The main reason I choose to study at Saitama University because in department of science and engineering have become one of the best the department in university at Japan. My supervisor is supportive, helpful, kind and good management for consulting students. However, in university have top class professors on research and have facilities in the laboratory or new devices for used in research. In the location of Saitama university are peaceful, beautiful and good weather for foreign student in Southeast Asia.Saitama university is the best university of research and academic to study and develop research in the world. Finally, Japan is the best weather, transportation, technology, the best of anime and J-Rock song.

Research Subject
Image Quality Enhancement: Existing Limitations & Scopes for Improvement

Research Summary
Image enhancement (IE) has been prominently utilized in a variety of disciplines, including medical, underwater, and satellite imaging systems, due to the greater clarity of image features. Existing IE methods usually suffer from various limitations. The main purpose of this research is to analyze the limitations deeply and provide solutions to the problems by introducing novel techniques, especially using fuzzy mathematics and logic.

Impression of SU and Japan
Saitama University has a beautiful green campus in Japan. I am very happy to have a professor like Dr. Tetsuya SHIMAMURA at this university. The research facilities of my lab are awesome. On March 5, 2025, I joined the 2025 7th International Conference on Image, Video and Signal Processing at Meiji University (Ikuta campus), Kawasaki, Kanagawa, Japan. The hospitalities I received on my journey from Saitama University to Meiji University and at the conference dinner will always be fresh in my memory. Maybe these hospitalities can only be expected in Japan.

Research Subject
Coordination between the Scheduler and Dynamic Voltage and Frequency Scaling (DVFS) in the Autoware Kernel

Research Summary
This research focuses on optimizing energy efficiency in the Autoware Kernel, a real-time operating system supporting DAG scheduling. The goal is to develop novel techniques for coordinating the scheduler with DVFS, ensuring real-time performance while reducing power consumption. Key objectives include designing DAG-aware DVFS algorithms, implementing slack-time utilization strategies, and integrating thermal awareness. The research aims to enhance energy efficiency in autonomous vehicle systems without compromising real-time guarantees, contributing to both academic knowledge and practical applications in the automotive industry.

Impression of SU and Japan
Saitama University offers a world-class research environment, its strong emphasis on innovation and academic excellence aligns perfectly with my research aspirations. The university provides exceptional facilities, including a comprehensive library, advanced laboratories, and resources tailored for international students. I chose Saitama University because of its reputation for cutting-edge research and its welcoming environment for global scholars. Japan’s rich cultural heritage, commitment to hard work, and technological leadership make it an ideal setting for academic growth. I am honored to be a part of the Azumi Lab under the guidance of Professor Takuya Azumi, who is extremely supportive and encouraging. His mentorship greatly motivates me to pursue impactful research.

Research Subject
III-V semiconductor-based ultraviolet (UV) LEDs and their related technologies

Research Summary
III-V semiconductor-based ultraviolet (UV) LEDs are key technology for applications such as sterilization, water purification, medical treatment, and sensing. These LEDs are made from III-V compound semiconductors, particularly aluminum gallium nitride (AlGaN), gallium nitride (GaN), and indium gallium nitride (InGaN), which are suitable for UV emission due to their wide bandgap. It can emit in the UV-A (320–400 nm), UV-B (280–320 nm), and UV-C (200–280 nm) ranges by adjusting the composition of AlGaN and related alloys. Compared to traditional mercury-based UV lamps, UV LEDs consume less power and have a longer operational lifetime. Unlike mercury lamps, UV LEDs are mercury-free and environmentally safer. III-V materials allow for miniaturization, making UV LEDs suitable for portable and embedded applications.

Impression of SU and Japan
Studying abroad in Japan has been an enriching experience, both academically and culturally. I fortunately got the opportunity to join the Quantum Optodevice Laboratory under Prof. Hiroyuki Yaguchi at Saitama University. He refers me to work as a student trainee in Riken a renowned institute of Japan under the Prof. Hideki Hirayama. The opportunity to learn from distinguished professors, engage in advanced research, and immerse myself in Japan’s unique culture has broadened my perspective and deepened my appreciation for global education. Joining the physics department at Saitama University in Japan marks the beginning of an exciting journey of exploration and discovery. I look forward to engaging in cutting-edge research, collaborating with esteemed professors, and immersing myself in Japan’s rich academic culture. Physics has always been a gateway to understanding the universe, and joining Saitama University in Japan allows me to dive deeper into this fascinating field. I am thrilled to learn, explore, and contribute to scientific advancements in an environment known for its excellence. The professors in the physics department at Saitama University are incredibly knowledgeable and supportive. Their guidance and expertise create an inspiring learning environment, fostering both academic growth and innovative research. I am grateful to be part of Saitama University physics department, where the professors are not only experts in their fields but also dedicated mentors. Their encouragement and insightful teaching make learning an enriching experience. I will make sure that my stay in Japan enhance the academic and culture linkage between Pakistan and Japan, may stay act as a gate way for students to come to Japan.

My Research Journey and Impression of Saitama University
Being a part of Saitama University has been an incredible experience, both academically and personally. The university provides a dynamic research environment where innovation and collaboration thrive. Under the esteemed guidance of Professor Shuhei Yagi, I am exploring Innovative Approaches for Effective Light Absorption and Distribution in Multi-Junction Tandem Solar Cells—a field that holds immense potential for the future of renewable energy. The well-equipped research facilities and state-of-the-art laboratories have greatly supported my work, making each day an exciting step toward discovery.
Beyond the lab, the warmth and hospitality of the university staff, faculty members, and fellow researchers have made my transition to Japan seamless. The I-House management team has played a crucial role in ensuring that international students feel comfortable and at home. Japan itself has been an inspiring place to live and study. The rich cultural heritage, combined with the discipline and kindness of the people, has left a profound impact on me. From the well-organized academic system to the respect for tradition and innovation, every aspect of life here offers a unique learning experience. I consider myself fortunate to be part of such a vibrant and forward-thinking academic community. To all new students joining Saitama University, I encourage you to embrace this journey with curiosity and enthusiasm. This experience will not only shape your academic path but also enrich your perspective on the world.
Wishing all future scholars, the very best in their endeavors!

Research Subject
Photocurrent Enhancement in Ion-Implanted GaPN Intermediate Band Solar Cells

Research Summary
The development of high-efficiency solar cells is crucial for improving renewable energy conversion and addressing global energy demands. Intermediate band solar cells (IBSCs) present a promising approach to surpassing the Shockley-Queisser efficiency limit by enabling the absorption of sub-bandgap photons. This capability enhances photocurrent generation, allowing solar cells to utilize a wider spectrum of sunlight. GaPN (Gallium Phosphide Nitride) is a highly suitable candidate for IBSCs due to its tunable bandgap, which allows for the optimization of energy absorption and emission properties. Additionally, GaPN’s compatibility with existing semiconductor technologies makes it a practical choice for advanced photovoltaic applications.
Ion implantation offers a significant advantage as an alternative fabrication technique for introducing intermediate energy states within the GaPN structure. Unlike traditional methods, ion implantation allows for precise control over dopant distribution, which can be tailored to enhance the formation of the intermediate band. Our recent studies have demonstrated that ion-implanted GaPN IBSCs exhibit improved photocurrent generation, effectively utilizing a broader portion of the solar spectrum, which enhances the overall efficiency of the solar cell.
This research highlights the potential of ion-implanted GaPN IBSCs as a pathway toward the next generation of high-efficiency photovoltaics. The ability to enhance solar energy conversion through intermediate band absorption represents a significant step forward in advancing sustainable energy technologies for the future.
Impression of SU and Japan
Saitama University, Japan. Pursuing my PhD here has been transformative, providing me with an exceptional academic environment and opening doors for research in renewable energy. I am deeply grateful to the Japanese government for the MEXT scholarship, which has allowed me to study at one of Japan’s esteemed institutions and contribute to solar energy research. Saitama University has played a pivotal role in my academic growth, offering world-class facilities, cutting-edge laboratories, and a supportive faculty. The collaborative atmosphere has enabled me to refine my ideas and expand my knowledge through discussions with professors, researchers, and fellow students. As a researcher from Bangladesh, I am committed to advancing renewable energy solutions that will benefit both the global community and my home country. I sincerely thank Japan and Saitama University for this invaluable opportunity.

Research Subject
Performance analysis and optimization of InSb based Thermo-Radiative Cell for Waste Heat Recovery

Impression of SU and Japan
It has been both a pleasure and an honor for me to be affiliated with Saitama University in Japan. My supervisor and departmental colleagues are extremely helpful and cooperative. The research laboratory is equipped with state-of-the-art instruments, which have consistently facilitated my research endeavors. Furthermore, I wish to express my appreciation for the attentiveness and care demonstrated by the staff and the I-house management team. Their commitment to addressing our concerns created an environment that felt akin to being in my home country. Japan, with its rich traditions and culture, has provided a unique backdrop for my academic pursuits. The inherent friendliness and disciplined nature of the people have left a lasting impression on me, leading me to regard the Japanese as among the most amiable individuals in the world. I anticipate that the valuable traditions and cultural aspects of Japan will continue to contribute positively to my daily life. I consider myself fortunate to be immersed in such an inspiring and friendly environment as I pursue my research activities at Saitama University. To all new students embarking on their journey at Saitama University and in Japan, I extend my heartfelt wishes for the best of luck. May this experience become the most enriching chapter of your lives.

Research Subject
Green Hydrogen Production through Advanced Catalysis and Innovative Carbon Capture Techniques incorporating Catalysis

Impression of SU and Japan
Whether at university, public or private centers, or school, the Japanese education design is committed and disciplined at any level. All we have seen or heard about the top-notch quality is not just fiction! As one of the world’s most high-tech countries, Japan has thrived in STEM (Science, technology, engineering, and mathematics). This makes it ideal for students in those fields. With plenty of programs to choose from, the academic choices are limitless. I was fortunate to be awarded a scholarship by ESITI international program to study for my Ph.D. for three years at Saitama University, one of the most famous universities in Japan. My supervisor is really supportive and helpful. If you are one of those people who prefer clean streets and cities with no trash dumped on the road, Japan is the perfect match for you. For a student, Japan is one of the finest places to get studies. Its diverse region and rich culture boast many architectural styles, tourist places, practices, traditions, and food. And the list is pretty much endless!

Research Subject
Human Computer Interaction, Computer Vision and Deep Learning

Impression of SU and Japan
Japan is one of the top countries to pursue higher education. That’s why I had a passionate to do my PhD from the Japanese universities. Later I found so many researchers with good quality in research in Bangladesh who pursued their PhD from Saitama University (SU). I talked to some of them and listened to the research quality of the SU. Then I applied to Professor Yoshinori Kobayashi to pursue my PhD and fortunately I got the chance. My professor is very kind and co-operative. I am very fortunate to have him as my supervisor. Also, I have found all the staff of SU are very friendly, helpful and student oriented. I hope I will be a pioneer researcher in the future after getting my PhD from SU. Finally, if anyone wants a friendly, helpful and safe environment besides good quality research environment, undoubtedly SU will be the best place for them.

Research Subject
Demonstration of Super-Resolution Microscopy Using Quantum Light for Biomedical Imaging

Research Summary
My research introduces a super-resolution microscopy technique using quantum-entangled photons, designed for high-precision biomedical imaging. This method enhances image contrast by detecting photon pairs, achieving higher sensitivity than classical techniques. With ultra-low illumination power, it ensures minimal damage to delicate biological samples, making it ideal for live-cell imaging and sensitive material analysis. Additionally, its simple setup offers practical usability in research labs. This quantum-based approach holds great potential for advancing imaging applications in medical diagnostics, biological research, and materials science, providing clearer, more detailed images essential for cutting-edge discoveries.
Impression of SU and Japan
Studying at Saitama University has been an enriching experience, blending academic excellence with cultural immersion. The university’s supportive environment, advanced research facilities, and welcoming community have fostered my growth both academically and personally. Japan, with its harmonious blend of tradition and innovation, has left a profound impression on me. From the breathtaking cherry blossoms to the efficient public transport and polite society, every aspect reflects meticulous care and respect. The warmth of the people, the rich cultural heritage, and the spirit of continuous improvement make Japan an inspiring place to learn and live.

Research Subject
Invariant measures for iterated function system's with inverses

Research Summary
Scientific revolution in the 17th century led to the discovery of an important branch of mathematics Analysis. Among its numerous other branches, functional analysis emerged as a rather complex and a diverse blend of Algebra and Topology. My research is related to functional analysis such as Invariant measures for iterated function systems with inverses and fixed point theory.

Impression of SU and Japan
I am extremely honored and privileged to have the opportunity of doing PhD at Saitama University.My supervisor has been really supportive and helpful. The other faculty and fellow students have been kind and supportive as well.
Moreover, I would like to appreciate the official workers of SU and International house due to their generous efforts to provide the required assistance. They have been very kind and supportive to provide any information. I've been inspired by their amazing work ethics. Additionally, I feel extremely secure while living in Japan as an international student.

Research Subject
Privacy Protection in Surveillance Cameras

Research Summary
In recent years, more and more surveillance cameras are being deployed throughout our surroundings, such as public parks, elevators, ATMs, airports, and highways and on many more places. These cameras are capturing huge amount of videos, at the same time, significant concerns about individual/human privacy have also been growing along with the vast application of surveillance cameras. Existing surveillance camera systems do not provide people with the right to control how facial information is collected and managed. There is violation of privacy rules in public surveillance cameras. Individuals’ faces are shown publicly without concern. Our research focuses on Enabling the privacy protection in surveillance cameras using Deep learning Techniques. Protect Individual’s Privacy. Blur the faces of individuals other than the required personal.

Impression of SU and Japan
The main reason I choose to study at Saitama University is because it has excellent reputation in Engineering and computing, with a stimulating environment. Saitama University has become one of the best universities in Japan; it has top class professors and is in the middle of a historic city, and accessible to everything. It has a strong international relations program which is perfect for me. I just love everything about Saitama University. The huge library, the park, I just found the place incredibly inspirational and motivating, the study programs, and the emphasis professors put hands-on practice. I am thrilled to learn about Japanese culture and excited to study where the technology is of high and excellent standard.

“If you explore every possible factor and ruminate over them to the point of squeezing your brain, you will have a better chance of getting things right."
(Masatoshi Koshiba, Nobel Prize, Physics, 2002)
Going to University, especially one as prestigious academic and research institution in Japan of Saitama University was a wonderful experience and memories. This was an opportunity for me to learn not only the world advancement in science and engineering technology as a material science passionate; specially semiconductors and devices, but also to learn about own-self; who I am, what want to do in life, and what is my responsibility for societies and thereby nation. Although, it was un-even and challenging at initial stage, I was able to retain me on the right path throughout years. Regardless, the evaluation of pros and cons, I embraced every opportunity, therefore, I became successful to find out something on which I was passionate and persistent. Thus, I achieved my dream of doctoral graduation, most importantly, knowledges to go further way as a passionate researcher with a good network and communities.
Three years of study and research in Saidai helped me to realize a concurrent study and advanced research with a new and innovative ideas related to my research field with its proper execution, therefore, I was offered a postdoctoral researcher position in Saitama University within several days of graduation and thereafter senior researcher position in Ritsumeikan University within a month. My research mainly focusses on preparation of 2D layered semiconductor and oxide materials using a simple economical way for the applications in electronic, optical and photovoltaic devices.
However, I am so lucky to have many Japanese friends including my lab members and staffs. I encourage to all students from different parts of the world to take an opportunity to study in Japan; especially at Saitama University to explore your dream, potentiality and knowledge as well as enjoy Japanese life even though you are not familiar with Japanese language. Japan will offer you a secured quality life. Japanese peoples are very much kind, polite and cooperative!!!! Best wishes for Saidai and saidai’s family.

My name is Truong Cong Tuan. I am a former PhD student at Advanced Photonics & Sensing Laboratory (Shioda Lab), Graduate School of Science and Engineering, Saitama University. I presently am a lecturer in Precisely Mechanical and Optical Engineering, School of Mechanical Engineering, Hanoi University of Science and Engineering, Hanoi, Vietnam.
Before coming to Japan, the image I had of Japan, was limited to Toyota, Honda, Sony, Sushi & earthquakes. But now I can appreciate that technology here is not only the big names like Honda, Panasonic and many others but it is part and parcel of everyday life, be it vending machines, toilet seats or even Suica card. Japanese food is so diverse as the cooking style & dishes are different in every prefecture. People here as very polite, hardworking, disciplined and proud of their culture & roots.
Saitama University is one of the famous University in Japan with lot of international students. Saitama University has good facilities for students such as library, cafeteria, gym ... Laboratory has all the necessary equipment for students to study and to do experiment. The course covers a wide research fields of Information Technology, Material Science, Mechanical Engineering and other fields. All courses are conducted in English.
I love the peaceful life & beautiful scenic views of SU, the best part about SU is that it is at less than a hour’s distance from the heart of Tokyo with all its glitter and fancy life and at the same time it has all the natural beauty of Chichibu, Kawagoe & Nagatoro equally close to it. Learning Japanese language is one of the way which helps to feel at home here. Then interacting with local people, travelling, enjoying their tradition are few things which widen your knowledge about Japan and it ultimately help one to adjust to it. Although being pure vegetarian, I am not yet able to adjust to Japanese food. It is a very good opportunity to avail, as Japanese universities are equipped with excellent infrastructure, intelligent & dedicated professors who are very much involved in your studies/ research. There labs are full of resources and you will get a very good chance of practical learning in university and other seminars, conferences, internships you attend while being here. Overall the SU is very safe, convenient, humble and a place to learn & enjoy.

I am Dr. Jaker Hossain, Associate Professor of Department of Electrical and Electronic Engineering, University of Rajshahi, Bangladesh. I came to Saitama University, Japan in September 2014 for my PhD program. Studying in Japan is a great privilege as one can get a nice and excellent research environment here. The life in Japan is highly secured and interesting. Japanese people are so cordial to help in any manner. Japanese universities have world class research facilities. Saitama University has a nice campus and the people around here are very nice. I have many nice memories at Saitama University. I was very lucky to be a part of world renowned Shirai Laboratory at Saitama University. I am now trying to establish a research lab in Bangladesh for doing research on energy harvesting based on the knowledge I acquired during my PhD study in Japan. A memory of my farewell party with my supervisor and lab mates.