My name is Gen Kurosawa. I study “Biological Timing”. We know timing of meal influences timing of sleep. Similarly, we know timing of taking medicine influences its efficacy. We know these facts, but we do not really know why. To answer these questions, my approach is to use two types of models. Mainly, I try to develop simpler models to understand the essence in Biological Timing. Simultaneously, I use realistic models (ex. 180 variable ODE model with genes and proteins) to make detailed predictions which can be tested experimentally in a very near future. At iTHEMS, I am happy that I can interact with colleagues from various disciplines.