Yousuke Utsumi works on integration and testing for the Large Synoptic Survey Telescope (LSST) camera which is the next generation US's astronomical camera as a physical science research scientist. He has been working on many kinds of astronomical topics through various instrumentation projects, especially focusing on wide field imaging. The Japan's widest astronomical camera for the largest-class telescopes, Hyper Suprime-Cam (HSC) of the Subaru telescope operated by National Astronomical Observatory of Japan, was his first professional experience. He was in charge of developing control software and conducting the camera commissioning. He also led a project to build a new astronomical observatory in Tibet with a 50cm telescope (Hiroshima University Operated Tibet Optical Robotic Imager; HinOTORI) under a collaboration with National Astronomical Observatories of China. He made its optical design, did integration and verified the whole system and investigated a logistics between Japan and China from the Japan side. He also took an important role to make a negotiation with both government. His scientific interest started from investigating an activity of meteor storms by developing a forward scattering radar but now expanding to investigate Cosmology through weak lensing technique, to explore distant galaxies, and to find new types of astronomical transients associated with gravitational wave or high energy neutrino. He holds a PhD in Science from the Graduate University for Advanced Studies in Japan. His name in Japanese Kanji Character: 内海 洋輔