Overview: The Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH) is an astronomical survey to investigate the co-evolution of cosmic large-scale structure, dark matter and the assembly and growth of galaxies as well as supernovae in the early Universe through transient studies. The survey covers two 1.8 square degree fields (COSMOS and SXDS) and provides optical (from the Hyper-Suprime-Cam on the Subaru telescope) and mid-infrared (from the Spitzer Space telescope) imaging at an unprecedented depth over this area. SPLASH is being led by scientists at IPAC and thus provides an important connection between IPAC and the Hyper-Suprime-Cam collaboration, which is the pre-cursor of Large Synoptic Survey Telescope (LSST) and uses the same software pipeline.