Yoshihiro Mizu Yaki Black Finish Blue steel Kurouchi Sujihiki Slicer Chef knife with Rosewood(9.5 IN, Regular) Grade: Mizu Yaki Kurouchi / Knife Type: Sujihiki (Slicer Sushi Sashimi )Knife Steel Type: Aoko Blue High Carbon Steel (Not Stainless) Blade: Double-Edged (50/50) / Blade Length: Available in 9.5(240mm) BOLSTER: Double Ebony wood / Handle Material: Shitan Rosewood Handle Hardness Rockwell C scale: 62-63 Saya: Not Included