member

Professor
Takayoshi MATSUMURA
I have been leading the Division of Cardiovascular and Genetic Research since 2023. Our division was established in 2004, and under the leadership of the first professor, Sadahiko Iwamoto, we have been conducting research to contribute to local patient care and welfare in line with the founding spirit of our university. In particular, Jichi Children’s Medical Center Tochigi provides highly specialized care for many children with rare congenital diseases from Tochigi and other prefectures. Genetic diagnosis of such children has been one of the main tasks of our research division. We will continue to carry out our mission and devote ourselves to further development.
As the term “$1000 genome” became popular some time ago, the development and rapid cost reduction of next-generation sequencing have made it not as difficult as it used to be to find out how the genetic information of an individual differs from that of others. However, it is still difficult to identify which of the many genetic differences that individual patients have are related to disease. This cannot yet be solved by next-generation sequencers and computers alone. In addition to the analysis of genetic information, experiments using cells and animals are essential. This is why we “do whatever is necessary from genetic analysis to mouse experiments.”
My mentor said, “To know the disease, you must know the normal.” Many physicians engaged in both research and patient care tend to focus only on the study of disease. However, the pathology of many diseases is complex, and often cannot be understood without understanding normal biological phenomena. We guide young researchers so that they can grasp the essence of life phenomena from a long-term perspective, rather than focusing on disease only.
Furthermore, even cutting-edge research is meaningless if it is not communicated to physicians in their daily clinical work. I am currently a member of the Japanese Society of Cardiology’s committee for “Guidelines for Genetic Testing and Genetic Counseling in Cardiovascular Disease.” The ultimate goal of our laboratory is to treat and prevent diseases and promote the health of patients, so we will actively promote such external activities as well.
Feb. 2024
Takayoshi Matsumura

Associate Professor
Ayumi MATSUMOTO
I am a pediatrician and my research focuses on clinical genetics. I am aiming to connect clinical and basic research and contribute to patients and society as much as possible. I am also in charge of the genetic counselor training course. Every day I am inspired by the motivation of veteran nurses, midwives, and paramedical staff as we learn together. Together with genetic counselors, my goal is to create a society where prejudice against genetic disorders is eliminated and those who wish to be tested can receive the benefits. Our Genetic Counselor Training Course is still in its infancy, but we invite you to join us and learn with us.

Assistant professor
Yoshitaka GUNJI
I joined the lab in October 2025. My research focuses on the mechanisms of inflammation and aging in cardiovascular diseases, aiming to uncover new therapeutic strategies through their regulation.
Outside the lab, I enjoy playing tennis and watching soccer. Watching my daughter grow every day reminds me to keep learning and growing as well.

Ph.D. student
TUMURBAATAR Suvd
Graduated from the Mongolian National University of Medical Sciences, and joined our lab in 2024. Working on genetic analysis of pediatric congenital diseases.

Master’s student
Aimen SALEEM
I am from Pakistan and completed my MBBS in 2022, followed by three years of clinical experience in Pakistan. Currently, I am a master’s student and joined the laboratory in April 2026 to pursue my interest in cardiovascular diseases and genetic research. I hope my journey here will allow me to continue learning, grow as a researcher, and build the skills needed to contribute to future advances in cardiovascular medicine. Outside the lab, I enjoy baking and traveling to explore new places and cultures.
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Master’s student
Mayumi IshikawaStudying in Genetic Counselor Training Course
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Master’s student
Suguru KAMISHIROStudying in Genetic Counselor Training Course

Researcher
Idalberto Issuf SAMPAIO E MELO BALDÉ
Native to Guinea-Bissau to the cardiovascular and genetic departement, where I am dedicated to decoding DNA. My science goal is to develop cardioprotective strategies focused on public health impact and the well-being of my people.

Research assistant
Rahmawati Solihah
I graduated from Parahyangan Catholic University, Indonesia, with a Bachelor of Civil Engineering, and from Bandung Institute of Technology, Indonesia, with a Master of Water Resources Management. I had previously contributed to research projects and feasibility studies within the civil engineering sector. Ever since I found out I was expecting my first child, I have immersed myself in health trends, using my spare time to dive into medical journals and evidence-based articles, although my formal education is outside the health-related field. Thus, being a part of this lab since April 2026 has been a truly engaging experience. My goal is to pursue continuous learning while making meaningful contributions to this team and society.

Genetic Counselor
Hiroko WAKABAYASHI
Graduated from the 2023 Genetic Counselor Training Course and passed the Certified Genetic Counselor Examination in October 2024. I graduated while working as a nurse at the affiliated hospital. I am currently engaged in genetic counseling as a Certified Genetic Counselor while concurrently performing nursing duties.
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Visiting professor
Sadahiko IWAMOTOHe was the first professor of our division.
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Collaborator (Clinical Pharmacology and Cardiology)
Daigo SAWAKI -
Collaborator (Cardiology)
Kenta FUJIMURA -
Collaborator (Cardiology)
Shunsuke SAITO -
Research assistant
Yukiko OHASHI -
Research assistant
Chie YANAGIDA
Alumni
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Yasutomi HIGASHIKUNI
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Kota SHIBAYAMA
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Hidetoshi TSUDA
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Kazuhisa WATANABE
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Chisato KAMEYAMA
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Mikiko FUKAYA
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Hiroko WAKABAYASHI
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Natsumi KOBAYASHI
