A Miyabi Kaizen II 5000FCD 5.5" prep knife (Shotoh) (SKU 34680-133). Store title says 5.25". FC61 core with 48-layer flower Damascus (49 layers including the core). Double FRIODUR ice-hardened; official page lists 61 Rockwell (spec table 60-62). Honbazuke edge, 9.5° to 12°. D-shaped black pakkawood handle with mosaic pin and Miyabi end cap. Concealed tang. Handcrafted in Seki, Japan. Specs from the zwilling.com Kaizen II 5.5" prep page.
This knife sharpens to a razor's edge every time.