Japan-EMNet Research Fellowship

I believe that, by paying what I have received forward to you and chasing excellence,
together we will grow, advance science, and make the world better.


  • Train future leaders in medical research in Japan and the U.S.
  • Build a bridge between Japan and the U.S. through training Japanese researchers
  • Everything we do we believe in your potential; we believe in helping you grow


Build the fundamentals and network to become researchers by using the curriculum, training experience, resource, and global network in the Hasegawa-lab and EMNet.

Approximately 2-3 years of duration. The model curriculum is:
First year:
— Gain the fundamentals of epidemiology and biostatistics through didactics of the MS (Epidemiology, Biostatistics, Computational Biology, Health Data Science) or MPH program at Harvard School of Public Health
— In parallel, analyze large databases at the EMNet (on-the-job training)
— Learn academic writing through publications and grant applications
— No clinical training

Second-third year(s): Develop and conduct own research projects (from the development of project, team, study protocol, IRB application, grant application, quality control, data cleaning, analysis, to publications) under direct mentoring.


— MD, MD/PhD, or PhD
— No restrictions of specialty (not limited to emergency medicine)
— Candidates with external funding support (e.g., scholarship, grants) are highly considered and have a higher chance of acceptance


Fellowship Director / PI:  Kohei Hasegawa (email: koheihasegawamd[@]gmail.com)

Current Fellows:

Yoshihiko Raita, MD, MPH (耒田善彦), MMSci candidate at Harvard Medical School: 2018-

Michimasa Fujiogi, MD: 2019-

Makiko Nanishi, MD: 2020-

Past Fellows:
1) Tadahiro Goto, MD, MPH (後藤匡啓;  tadahirogoto[@]gmail.com) : 2015-2018.
Currently at the University of Tokyo.

Summary of achievements:
— American College of Emergency Physicians Scientific Assembly 2015: Excellence in Research Award (Best Paper).
— Comparing Ran-Out Status of Inhaled Short-Acting Beta-Agonists in Emergency Department Patients with Acute Asthma: 1996-1998 versus 2015-2017. J Allergy Clin Immunol Pract. 2018 Feb 14.
— Obesity and severity of acute exacerbation of chronic pulmonary disease. Ann Am Thorac Soc. 2017 Oct 20.
— Reduced risk of acute exacerbation of COPD after bariatric surgery. Chest. 2017
— Association of bariatric surgery with risk of infectious diseases: A self-controlled case series analysis. Clin Infect Dis. 2017;65(8):1349-1355
— Infectious Disease-related Emergency Department Visits Among the Elderly in the United States. Am J Geriatr Soc. 2016;64(1):31-36
— Sex Differences in the Risk of Hospitalization among Patients Presenting to U.S. Emergency Departments with Asthma Exacerbation. J Allergy Clin Immunol Pract. 2016;4(1):149-151
— Prevalence of Pulmonary Embolism in Patients with Syncope. JAMA Intern Med. 2018 Mar 1;178(3):356-362

2) Atsushi Hirayama, MD, MPH (平山敦士; email:atsushihirayamamd[@]gmail.com): 2016-2018.
Currently at the National Cerebral and Cardiovascular Center.

Summary of achievements:
— Association of obesity with severity of heart failure exacerbation: A population-based study. J Am Heart Assoc 2018 Mar 15;7(6).
— Hirayama A, Goto T, Faridi MK, Camargo CA Jr., Hasegawa K. Age-related differences in the rate and diagnosis of 30-day readmission after hospitalization for acute ischemic stroke. Int J Stroke 2018 Jan 1 [Epub ahead of print]
— Hirayama A, Goto T, Faridi MF, Camargo CA Jr., Hasegawa K. Association of obstructive sleep apnea with acute severity of chronic obstructive pulmonary disease exacerbation: A population-based study. Intern Med J 2018; in press