Yoshihiro High Carbon Blue Steel1 Aonamiuchi Yanagi Sashimi Sushi Japanese Chef's Knife 10.5inch(270mm)with Yew Handle KNIFE CAN BE OXIDIZED WITHOUT PROPER CARE* RECOMMEND FOR PROFESSIONAL ONLY* Grade: Aonamiuchi / Knife Type: Yanagi (Sushi Sashimi Chef Knife) Steel Type: AoKo (Blue Steel #1) High Carbon Steel / Blade: Single-Edged / Blade Length: 10.5" (270mm) BOLSTER: Water Buffalo Horn (BOLSTER COLOR -VARIES) / Handle Material: Japanese Yew Handle Hardness Rockwell C scale: 64 / Saya Cover : Included