Emeritus Professor of Hiroshima University
Environmetrics and Applied Statistics
Member of the Biometrics Research Group
Hiroshima University


Research Interests
  • Study of excess risk of mortality of solid cancers due to initial/non-initial radiation exposure in Hiroshima among atomic bomb survivors
  • Study of mathematical modeling for radiation/chemical carcinogenesis based on multistage hypothesis.
  • Study of method for analyzing ordered categorical response data


Sample Publications
  • Megu Ohtaki, Tetsuji Tonda, Kazuyuki Aihara: A Two-Phase Poisson Process Model and its Application to Analysis of Cancer Mortality among A-bomb Survivors, Mathematical Biosciences, 268, 31-37, 2015. doi:10.1016/j.mbs.2015.07.004.
  • Megu Ohtaki: Re-construction of spatial-time distribution of black rain in Hiroshima based on statistical analysis of witness of survivors from atomic bomb, Revisit The Hiroshima A-bomb with a Database -Latest Scientific View on Local Fallout and Black Rain-, Hiroshima City, 131-144, 2011.
  • Megu Ohtaki, Keiko Otani, Keiko Hiyama, Naomi Kamei, Kenichi Satoh Eiso and Hiyama: A robust method for estimating gene expression states using Affymetrix microarray probe level data, BMC Bioinformatics, 11, 2010. doi:10.1186/1471-2105-11-183.
  • Megu Ohtaki, Ohtsura Niwa: A mathematical model of radiation carcinogenesis with induction of genomic instability and cell death, Radiation Research, 156, 672-677, 2001.