Hiroyuki Hikichi

Research Fellow

Department of Social and Behavioral Sciences

Hiroyuki Hikichi, PhD, is a research fellow in the Department of Social and Behavioral Sciences at the Harvard T.H. Chan School of Public Health. His research interests are changes of the health status of older individuals in an affected area of the 2011 earthquake and tsunami in Japan, and the prevention of physical and/or cognitive disability by encouraging social interaction among Japanese older individuals.

Selected papers (Complete list of published work)

Disaster experience and health

Hikichi, H., Aida, J., Kondo, K., Tsuboya, T., Matsuyama, Y., Subramanian, SV., & Kawachi, I. Increased risk of dementia in the aftermath of the 2011 Great East Japan Earthquake and Tsunami. Proceedings of the National Academy of Sciences of the United States of America. 2016: 113(45): E6911-E6918. DOI: 10.1073/pnas.1607793113.

Social capital and disaster resilience

Hikichi,H., Tsuboya, T., Aida, J., Matsuyama, Y., Kondo, K., Subramanian, SV. & Kawachi, I. Social capital and cognitive decline in the aftermath of a natural disaster: a natural experiment from the 2011 Great East Japan Earthquake and Tsunami. The Lancet Planetary Health. 2017: 1(3): e105-e113. DOI: http://dx.doi.org/10.1016/S2542-5196(17)30041-4.

Hikichi, H., Aida. J., Tsuboya, T., Kondo, K., & Kawachi, I. Can community social cohesion prevent posttraumatic stress disorder in the aftermath of a disaster? A natural experiment from the 2011 Tohoku Earthquake and Tsunami. American Journal of Epidemiology. 2016: 183(10): 902-910. DOI: 10.1093/aje/kwv335.

Hikichi, H., Sawada, Y., Tsuboya, T., Aida, J., Kondo, K., Koyama, S., & Kawachi, I. Residential relocation and change in social capital: A natural experiment from the 2011 Great East Japan Earthquake and Tsunami. Science Advances. 2017: 3(7): e1700426. DOI: 10.1126/sciadv.1700426.

Prevention of functional disability in the elderly

Hikichi, H., Kondo, K., Tokunori, T., & Kawachi, I. Social interaction and cognitive decline: Results of a 7-year community intervention. Alzheimer’s & Dementia: Translational Research & Clinical Interventions. 2017: 3(1): 23-32. DOI: http://dx.doi.org/10.1016/j.trci.2016.11.003.

Hikichi, H., Kondo, N., Kondo, K., Aida, J., Takeda, T., & Kawachi, I. Effect of community intervention program promoting social interactions on functional disability prevention for older adults: propensity score matching and instrumental variable analyses, JAGES Taketoyo study. Journal of Epidemiology and Community Health. 2015; 69(9):905-910. DOI: 10.1136/jech-2014-205345.


News article of The Wall Street Journal
Social Ties Are Key for Survivors of a Disaster

NEWS letter from HSPH
After disaster, social ties may help elderly stave off cognitive decline

Elderly may face increased dementia risk after a disaster