Professor and Dean Masahiro Hashizume

Speciality / Research theme / Keywords

Climate change and health, Environmental epidemiology, Planetary health, Global health

Supervision

Qualifications

• PhD, London School of Hygiene & Tropical Medicine (LSHTM), University of London
• Medical License (Japan)

Personal/work Web page addresses

https://www.tmgh.nagasaki-u.ac.jp/about_tmgh/dean

Background

• Professor / Dean, School of Tropical Medicine and Global Health, Nagasaki University (2025–present)
• Professor, Department of Global Health Policy, Graduate School of Medicine, The University of Tokyo (2019–present)
• Professor, Institute of Tropical Medicine, Nagasaki University (2012–2019)
• COE Research Fellow / Assistant Professor, Institute of Tropical Medicine, Nagasaki University (2006–2011)

Teaching

• Graduate-level teaching at The University of Tokyo and Nagasaki University: Global health policy, epidemiology, and environmental health (climate change and health) — lectures and practicums.
• Organizing Team, Asia Summer School on Time-Series Analysis for fostering early-career researchers across Asia.
• Promote international academic collaboration, including the development of joint degree program.

Research

• Epidemiological studies on health impacts of climate change, effectiveness of adaptation, and population vulnerability.
• Integrated research on environment–society–health from a Planetary Health perspective.

The country/countries where you work currently

Japan; Asia–Pacific (Thailand, Korea, China, the Philippines, Taiwan, Bangladesh, etc.); collaborations in Europe (UK, Spain); and global analyses.

Five MOST IMPORTANT/INTERESTING recent publications

1. Yuan L, Madaniyazi L, Vicedo-Cabrera AM, Ng CFS, Oka K, Chua PLC, Ueda K, Tobias A, Honda Y, Hashizume M. Non-optimal temperature-attributable mortality and morbidity burden by cause, age and sex under climate and population change scenarios: a nationwide modelling study in Japan. Lancet Reg Health West Pac. 2024;52:101214.
2. Chua PLC, Tobias A, Madaniyazi L, Ng CFS, Phung VLH, Fu SH, Rodriguez PS, Brown P, Coelho MSZS, Saldiva PHN, Scovronick N, Deshpande A, Salazar MAS, Dorotan MMC, Tantrakarnapa K, Kliengchuay W, Abrutzky R, Carrasco-Escobar G, Roye D, Hales S, Hashizume M. Association between precipitation and mortality due to diarrheal diseases by climate zone: a multi-country modeling study. Environ Epidemiol. 2024; 8(4): e320.
3. Madaniyazi L, Armstrong B, Tobias A, Mistry MN, Bell ML, Urban A, Kyselý J, Ryti N, Cvijanovic I, Ng CFS, Roye D, Vicedo-Cabrera AM, Tong S, Lavigne E, Íñiguez C, da Silva SDNP, Madureira J, Jaakkola JJK, Sera F, Honda Y, Gasparrini A, Hashizume M; Multi-Country Multi-City Collaborative Research Network. Seasonality of mortality under climate change: a multicountry projection study. Lancet Planet Health. 2024; 8(2): e86–e94.
4. Chua PLC, Ng CFS, Tobias A, Seposo XT, Hashizume M. Associations between ambient temperature and enteric infections by pathogen: a systematic review and meta-analysis. Lancet Planet Health. 2022; 6(3): e202–e218.
5. Chua PLC, Huber V, Ng CFS, Seposo XT, Madaniyazi L, Hales S, Woodward A, Hashizume M. Global projections of temperature-attributable mortality due to enteric infections: a modelling study. Lancet Planet Health. 2021; 5(7): e436–e445.

Message

Research inevitably brings rejected hypotheses and unexpected results. The real learning happens in that process. Even when outcomes aren’t what you hoped for, take the time to ask why—carefully and persistently.