The SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization,
and Ices Explorer) is the NASA MIDEX astrophysics mission, designed to deliver the first
all-sky infrared spectro-photometric data. This ambitious mission aims to probe the
origins of the Universe, explore the formation and evolution of galaxies, and
investigate whether planets around other stars could harbor life.  As the sole
international partner on the SPHEREx mission, the KASI SPHEREx team plays a crucial role
in the mission, contributing to hardware development, data reduction pipelines, and
major and legacy science cases. Following the successful measurement of system-level
performance, the SPHEREx is undergoing satellite-level testing and its data reduction
modules are being thoroughly evaluated.  With the launch anticipated early next year, I
present the current status of the SPHEREx project and its associated scientific
activities.