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Young Researchers

Q1. Please tell us about your current research.
Q2. Please give a message to students.

Akinari HOSHI,Ph.D.Associate Professor
Akinari HOSHI, Ph.D.
Fundamental Sciences
Mathematical Science

A1. My research area is number theory and algebraic geometry in mathematics. In mathematics, there are seven important problems called the Millennium Prize Problems (each with a US$1 million prize award) announced by the Clay Mathematics Institute in USA in 2000. Although one of the problems, the Poincaré conjecture, was solved by Grigori Perelman, the remaining six are still unsolved to this date. My research is related to three of the remaining six: the Riemann hypothesis, the Hodge conjecture, and the Birch and Swinnerton-Dyer conjecture. In number theory, there are many other famous problems such as Fermat's last theorem, which was proved by Andrew Wiles at Princeton University in 1994 after 360 years of conjecture, and unsolved ones such as the abc-conjecture and the twin prime conjecture. Number theory is developing in its interactions with algebraic number theory, analytic number theory, zeta functions, elliptic curves and modular forms, arithmetic geometry, and algebraic geometry. In this field, there are many Japanese mathematicians’ contributions: in old days, for example, class field theory by Teiji Takagi and Iwasawa theory by Kenkichi Iwasawa, and others in recent days as well. Number theory and algebraic geometry are very attractive research areas in mathematics and studied at many universities and research institutes all over the world. My research is in such an exciting area where both number theory and algebraic geometry intertwine.

A2. Please look at a problem from various perspectives. There are many subject areas in mathematics, and they are connected organically. Widening your view by studying different subject areas rather than delving only into yours may lead you to your original and novel research in the future.

Masahiro OTANI, Ph.D.Specially Appointed Assistant Professor
Masahiro OTANI, Ph.D.
Life and Food Sciences
Agriculture and Bioresources

A1. Recent advances in biotechnology have enabled the breeding of what once had been dream plants, such as blue roses and blue lilies. Our research team applies such advanced technology, including tissue culture and genetic transformation, in order to generate ornamental plants which are visually modified in terms of color and form. As a prerequisite for this genetic transformation of horticultural traits, we have to understand target traits at the molecular level; thus, we also aim to elucidate the molecular mechanism of horticultural traits of colors and forms of flowers and plants. We are deeply impressed and excited when plants with novel horticultural traits are successfully obtained.

A2. Throughout your graduate studies, you may go through many failures and setbacks. However, your effort never goes unrewarded. Under any circumstances, enjoy your studies!


Samuel CHOI, Ph.D.Assistant Professor
Samuel CHOI, Ph.D.
Assistant Professor
Electrical and Information EngineeringElectrical and Electronic Engineering
Research Associate Professor
Institute for Research Promotion

A1. Optoelectronics is one of the key technologies that can be applied to almost all kinds of science and technology including information, communication, energy, astronomy, and medical and industrial fields. By combining advanced optoelectronics based on various optical interference measurement techniques, I am, in our lab, engaged in the research and development of novel light sources and precision measurement systems. For instance, supercontinuum light produced by using non-linear effects in optical fibers and ultrashort pulse lasers can be applied to optical coherence tomography for noninvasive imaging of layered biological tissues with a resolution of several micrometers. Furthermore, in collaboration with medical researchers, we are working on the development of multi-frequency optical coherence microscopy that can collectively measure the micro-vibration of the sensory epithelium of the inner ear cochlea tissues. With high-definition 3D tomographic imaging, this device can help elucidate, with an accuracy of nanometer order, the movement of living tissues that vibrate at a frequency of 10 to 100 kHz, and thus is expected to contribute to medical development in the future.

A2. Undergraduate and graduate life is important for you to develop overall skills useful in life, therefore, please devote yourself to study and research. Regardless of your future path, various experiences, both social and academic, in an assigned laboratory are more valuable than anything else for you to become able to take an active part in society in the future.