The Science of Board Cushion: A 2-Year Test of Hasegawa, Hi-Soft, and Japanese Synthetic Cutting Surfaces

End-grain wood looks classic, but synthetic Japanese cutting surfaces fundamentally change the rules of edge retention. After two years of continuous daily testing across home and studio kitchens, we evaluate Hasegawa's wood-core architecture, Hi-Soft PVA, and Asahi rubber to find the ultimate cutting surface for high-hardness steel.