Yugo Kanaya is a Principal Researcher/Deputy Director of Earth Surface System Research Center (ESS) of Japan Agency for Marine-Earth Science and Technology (JAMSTEC). He received his Ph.D. in Chemistry at the University of Tokyo and joined JAMSTEC in 2000. He started his career with developing a laser-induced fluorescence instrument measuring OH/HO2 radicals, which was then applied to field observations, testing tropospheric photochemistry theory to reveal importance of halogen chemistry and heterogeneous loss of HO2 on aerosol surfaces. Upon his strong interest on optical measurements, he extended his studies on ground and ship-based MAX-DOAS observations in support of satellite observations. His recent works are also on diagnosis of ozone production rates and regimes and on emission/removal rates of black carbon, both of which are important short-live climate forcers (SLCFs). His group is engaged in shipborne observations of ozone, halogens, and fluorescent aerosols to explore atmosphere/ocean interactions. He actively participates in many international studies: HOxCOMP, CINDI, EMeRGe-Asia, TROPOMI validation, GEMS and PGN. He is also serving as a Review Editor of IPCC AR6 WG1 Chapter 6 (SLCFs),