Labs and Faculty
Core Laboratories
Laboratory of Molecular Ecological Genetics

ISHIKAWA Asano Assoc. Prof. Ph.D.


Evolutionary biology, Ecological genetics


Adaptive evolution, Life-history evolution, Eco-evo-devo


Organisms exhibit diverse shapes, behaviors, and life histories that adapt to complex and fluctuating environments. How and why such diverse phenotypes have evolved and have been maintained in nature? We will find the answers by observing the organisms closely, analyzing the molecular mechanisms carefully, and following their dynamics in ecosystems. Let’s solve the mystery of evolution and diversification!


Ever since I was a child, I have been fascinated by the evolution and diversification in nature. During my Ph.D., I investigated the regulatory mechanisms of polyphenism, where a single genotype produces multiple phenotypes depending on the environment, in aphids. I described the developmental processes of polyphenism and revealed the physiological mechanisms which determine the embryonic fates based on the external conditions. After getting my Ph.D., I shifted my research species to sticklebacks to identify genes and mutations responsible for phenotypic diversification. I have introduced a wide range of molecular genetic techniques to them and found the key genes and mutations important for adaptive evolution. I aim to employ comprehensive approaches to reveal the molecular and ecological mechanisms which accelerate and/or constraint the diversification in complex natural environments.

  • Field sampling in Bekanbeushi river

  • Fertilization check


2021- Present Associate Professor, Laboratory of Molecular Ecological Genetics, Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo.
2020 - 2021 Assistant Professor, Graduate School of Life Sciences, Tohoku University (Cross appointment)
2015 - 2021 Assistant professor, National Institute of Genetics
2014 - 2015 Project postdoctoral researcher, National Institute of Genetics
2011 - 2014 JSPS Research Fellow (PD), National Institute of Genetics
2008 - 2011 JSPS Research Fellow (DC1), Graduate School of Environmental Science, Hokkaido University
2011 Ph. D. Graduate School of Environmental Science, Hokkaido University
2008 M. Sc. Graduate School of Environmental Science, Hokkaido University
2006 B. Sc. Department of Biological Science, Hokkaido University