Watch Chapter 5 of a lecture from the Kyoto University ELCAS 2017 Basic Course Opening Ceremony, delivered by Associate Professor Atsuko Ichikawa from the Graduate School of Science. Explore fundamental questions about the composition and mechanisms of our universe through the lens of particle physics, with special focus on cutting-edge neutrino research. The lecture was presented at the Kyoto University International Science Innovation Building Symposium Hall on September 16, 2017, offering insights into the frontiers of modern physics research.