Hideharu Numata is an Emeritus Professor and a Program-Specific Professor at Kyoto University, Japan. He was a Professor at the Graduate School of Science, Osaka City University, Japan, in 1998-2009, and the Graduate School of Science, Kyoto University, in 2009-2021. His research interests include physiological mechanisms for seasonal adaptations in insects, e.g., photoperiodism and circannual rhythm. He was the President of the Entomological Society of Japan in 2013-2014, and a Councilor of International Congress of Entomology in 2008-2016. He was the Editor-in-Chief of Entomological Science in 2010-2011 and Zoological Science in 2020-2021. Kenji Tomioka is an Emeritus Professor and a Program-Specific Professor of Okayama University, Japan. He was a Professor at Department of Biology, Faculty of Science, Yamaguchi University, Japan in 1995-2003, and the Graduate School of Natural Science and Technology, Okayama University, in 2003-2021. His research interests include molecular and neural basis of insect circadian rhythms and photoperiodism. He has been a member of the editorial board of Journal of Insect Physiology since 1992, Zoological Science since 2003, Zoological Letters since 2014, and Physiological Entomology since 2015.