Koichiro Shiba, PhD, MPH
Assistant Professor
Boston University School of Public Health
Dept of Epidemiology

PhD, Harvard School of Public Health
MPH, University of Tokyo

My research focuses on the application of epidemiologic and social science thinking and methods for rigorous causal inference in studying social determinants of health.

Specifically, I have worked on three themes of research. First, I study the effects of traumatic events (e.g., disasters, child adversity, pandemic, and global financial crisis) on population health, with a particular focus on older adult populations. Second, I study the roles of social relationships and social engagement in promoting health of older adults and building resiliency. I have also investigated how the internet-based social interactions can influence population health. Third, my research extends the traditional “risk factor” epidemiology examining a narrow set of health outcomes. I study the impacts of positive psychological factors (e.g., purpose in life, Ikigai) on health and determinants of multidimensional well-being (i.e., human flourishing).

Methodologic tools for causal inference I often use include: methods for the analysis of a time-varying treatment (e.g., marginal structural model, doubly-robust targeted maximum likelihood estimation combined with Super Learner ensemble of algorithms including ML-based ones), causal mediation analysis, assessment of effect heterogeneity using either a traditional interaction analysis or a novel ML-based technique, and longitudinal outcome-wide analytic framework.

Diversity, Equity, Inclusion and Accessibility

Dr. Shiba's research directly concerns addressing inequalities. As a social epidemiologist, Dr. Shiba studies social determinants of health (SDH). Although examining the population average impact of SDH as an upstream determinant of health is valuable on its own for disease prevention at the population level and promoting public health, his SDH research has also considered a) the distributions of the SDHs within and across populations and b) how the effects of the SDHs can be heterogeneous. Dr. Shiba also leveraged his expertise in measuring health disparity and applied it to the science of well-being, where the focus of research has been primarily on assessing population averages.

Dr. Shiba values diversity and inclusion in research as keys to general academic excellence because investigators’ identities (e.g., nationality, gender, race/ethnicity) and educational backgrounds (e.g., clinicians, social scientists, statistician) influence many aspects of research such as research questions and hypotheses, methodology, and interpretation of data.

Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.

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  1. Shiba K, Hikichi H, Okuzono SS, VanderWeele TJ, Arcaya M, Daoud A, Cowden RG, Yazawa A, Zhu DT, Aida J, Kondo K, Kawachi I. Long-Term Associations between Disaster-Related Home Loss and Health and Well-Being of Older Survivors: Nine Years after the 2011 Great East Japan Earthquake and Tsunami. Environ Health Perspect. 2022 Jul; 130(7):77001. PMID: 35776697; PMCID: PMC9249145; DOI: 10.1289/EHP10903;
  2. Kawahara T, Shiba K, Tsuchiya A. Application of Causal Inference Methods in the Analysis of Observational Neurosurgical Data: G-Formula and Marginal Structural Model. World Neurosurg. 2022 May; 161:310-315. PMID: 35505549
  3. Guimond AJ, Shiba K, Kim ES, Kubzansky LD. Sense of purpose in life and inflammation in healthy older adults: A longitudinal study. Psychoneuroendocrinology. 2022 07; 141:105746. PMID: 35364478; PMCID: PMC9149071; DOI: 10.1016/j.psyneuen.2022.105746;
  4. Shiba K, Cowden RG, Counted V, VanderWeele TJ, Fancourt D. Associations of home confinement during COVID-19 lockdown with subsequent health and well-being among UK adults. Curr Psychol. 2022 Mar 15; 1-10. PMID: 35309290; PMCID: PMC8922081; DOI: 10.1007/s12144-022-03001-5;
  5. Shiba K, Cowden RG, Gonzalez N, Ransome Y, Nakagomi A, Chen Y, Lee MT, VanderWeele TJ, Fancourt D. Associations of online religious participation during COVID-19 lockdown with subsequent health and well-being among UK adults. Psychol Med. 2022 Feb 22; 1-10. PMID: 35189993
  6. Shiba K, Cowden RG, Gonzalez N, Lee MT, Lomas T, Lai AY, VanderWeele TJ. Global Trends of Mean and Inequality in Multidimensional Wellbeing: Analysis of 1.2 Million Individuals From 162 Countries, 2009-2019. Front Public Health. 2022; 10:824960. PMID: 35237554; PMCID: PMC8882600; DOI: 10.3389/fpubh.2022.824960;
  7. Okuzono SS, Shiba K, Kim ES, Shirai K, Kondo N, Fujiwara T, Kondo K, Lomas T, Trudel-Fitzgerald C, Kawachi I, VanderWeele TJ. Ikigai and subsequent health and wellbeing among Japanese older adults: Longitudinal outcome-wide analysis. Lancet Reg Health West Pac. 2022 Apr; 21:100391. PMID: 35141667; PMCID: PMC8814687; DOI: 10.1016/j.lanwpc.2022.100391;
  8. Yazawa A, Shiba K, Inoue Y, Okuzono SS, Inoue K, Kondo N, Kondo K, Kawachi I. Early childhood adversity and late-life depressive symptoms: unpacking mediation and interaction by adult socioeconomic status. Soc Psychiatry Psychiatr Epidemiol. 2022 Jun; 57(6):1147-1156. PMID: 35103808
  9. Shiba K, Daoud A, Kino S, Nishi D, Kondo K, Kawachi I. Uncovering heterogeneous associations of disaster-related traumatic experiences with subsequent mental health problems: A machine learning approach. Psychiatry Clin Neurosci. 2022 Apr; 76(4):97-105. PMID: 34936171; PMCID: PMC9102396; DOI: 10.1111/pcn.13322;
  10. Kamada M, Hayashi H, Shiba K, Taguri M, Kondo N, Lee IM, Kawachi I. Large-Scale Fandom-based Gamification Intervention to Increase Physical Activity: A Quasi-experimental Study. Med Sci Sports Exerc. 2022 01 01; 54(1):181-188. PMID: 34366420; PMCID: PMC8677610; DOI: 10.1249/MSS.0000000000002770;
Showing 10 of 31 results. Show More

This graph shows the total number of publications by year, by first, middle/unknown, or last author.

Bar chart showing 31 publications over 8 distinct years, with a maximum of 10 publications in 2022


2019 Harvard T.H. Chan School of Public Health: Teaching Assistant Award
2015 Japan Epidemiological Association: Best Presentation
2015 University of Tokyo: Graduate Study Scholarship
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715 Albany St
Boston MA 02118
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