The Japanese word for whale is "kujira" and these super cool kogatanas feature a humpback whale design. The steel is SK5 carbon steel which is similar to 1080 steel. It's an ideal steel for a tool like this.
Weight: 2.1 oz/60g
Blade Length: 50 mm
Overall Length: 152 mm
Spine Thickness at Heel: 3.1 mm
Blade Height at Heel: 22.3 mm