RERF Research

Sizes of RERF studies

Participant numbers and timing of the studies conducted by RERF.

Study population
Study period
Life Span Study
(study on death causes)
120,000 persons
1950 – ongoing
Adult Health Study
25,400 persons
1958 – ongoing
In Utero Study
3,600 persons
1946 – ongoing
Genetic Studies
(studies on the A-bomb survivors’ children)
  Mortality (Life Span Study)
77,000 persons
1946 – ongoing
  Birth Defects
77,000 persons
1948 – 1954
  Sex Ratio
140,000 persons
1948 – 1962
  Cancer Incidence
77,000 persons
1958 – ongoing
  Chromosome Aberrations
16,000 persons
1967 – 1985
  Biochemical Study
24,000 persons
1975 – 1985
  Molecular Genetic Study
1,000 families,
1,500 persons
1985 – ongoing
  Health Examination Study
12,000 persons
2002 – ongoing


Research programs

Generally, six research programs are conducted at RERF. Please click below for details.


Research planning

RERF research is initiated only after careful planning takes place. Consulting with the Ethics Committee, which includes outside leaders, RERF formulates such research plans, in compliance with national and international laws and regulations to protect research subjects, from both ethical and scientific perspectives.


Partner graduate schools

RERF established joint lectures with Hiroshima University in 2002. As guest instructors, RERF researchers in cutting-edge radiological sciences teach and provide guidance to students at the university.


Partner institutions

RERF has signed agreements with several universities for promoting cooperation in education and research.