Graduate School of Agricultural and Life Sciences, The University of Tokyo

Investigating tree diseases and exploring techniques for managing forests and trees healthy

I conduct researches which aim to promote the “health” of forests and trees. Many factors hinder the healthy growth of forests and trees, and among them I conduct comprehensive studies primarily on diseases caused by microorganisms. I aim to elucidate all aspects, including the causes of disease (etiology), the mechanisms of disease development (pathogenesis), the environments in which outbreaks occur, the strength and threat posed by the causal agents (virulence), and how trees counter them (resistance). These efforts also constitute an exploration of the question: “What is health for forests and trees?” Alongside elucidating phenomena, I also try to develop methods that support the healthy growth of forests and trees. To date, my work has spanned natural forests, plantations, nurseries, wooded areas, and ornamental trees, addressing issues of forest and tree health from diagnosis and control to mechanistic understanding. Going forward, I will continue to return to the “field,” leveraging both fieldwork and laboratory work to tackle these challenges.

Cultivating sensitivity to nature

I place great importance on conveying accurate knowledge about the structure and function of forests and trees. At the same time, I aim to cultivate people who—beyond accumulating knowledge—can notice issues, think independently, and contribute to solving present challenges. When working with nature, I believe it is crucial to perceive accurately the phenomena and changes that occur in the natural world. Therefore, I emphasize cultivating field sensitivity and actively engage in experiential education in the field. Furthermore, I believe the true purpose of education lies in the refinement of character, and I keep this firmly in mind. To date, in addition to leading numerous practical courses, I have implemented many initiatives beyond specialized education, including the university-wide experiential seminar for first-year undergraduates, field-experience programs and off-campus practicums for high school students. I have also engaged in science experience camps organized by private companies for elementary and junior high school students, as well as municipal forest-learning programs and the training of their supporters. Going forward, I hope to continue helping create opportunities to know, sense, and think about forests and nature.

Supporting the healthy growth of forests and trees

In recent years, societal expectations of forests have diversified. Accordingly, both silvicultural management systems and the tree species being planted are diversifying, particularly in plantations. Under these new species and management systems, there is a risk that forest damage—including diseases, potentially of previously unknown types—will newly emerge as issues. I aim to contribute my expertise to identifying the causes of forest damage arising in new forest management initiatives and to establishing countermeasures. For example, in recent years, efforts have been made across Japan to establish plantations of fast-growing eucalypts, with short-rotation harvesting for use as woody biomass fuel. Given the limited knowledge in Japan about forest damage affecting the growth and yield of eucalyptus plantations, we are evaluating the susceptibility of various eucalyptus species to frost damage and are currently elucidating the diseases occurring in eucalyptus plantations and their associated risks. As the management of forests and trees draws public attention, I seek to support these initiatives from the standpoint of forest health and mitigating forest damage.