Dr. Hisashi Yashiro is a senior researcher at the National Institute for Environmental Studies (NIES) in Tsukuba, Japan. He is currently a member of the Greenhouse gases Observing Satellite (GOSAT) project. He obtained a Ph.D. degree in geophysics (atmospheric science) from Tohoku University. From 2011 to 2019, he was a member of RIKEN R-CCS as a research scientist, worked on weather/climate modeling, and contributed to the large-scale weather simulation on the K computer. He is a core developer of the Nonhydrostatic ICosahedral Atmospheric Model (NICAM), a Japanese exascale climate model. He worked on the system-application co-design between the computational science of the weather/climate domain and the supercomputer Fugaku as a member of the FLAGSHIP2020 project in RIKEN R-CCS.