Deba is a knife with a thicker blade than usual and very durable, designed for heavy work. Deba is used in Japan primarily for processing raw fish: gutting, removing scales, removing fish heads and piercing bones and smaller bones. If necessary, you can also cut chicken bones.

The Ryutoku Octagon series features traditional lower-priced Japanese chef's knives manufactured by Fuji Cutlery Corporation in Niigata, Japan.

The blade is made of stainless steel Sus420J2, which is characterized by sharpness, good resistance to rust and easy maintenance. The hardness of the blade is HRC 56.

The handle is made of light magnolia wood and has the characteristic octagonal shape of Japanese knives, and the grayish bolster is made of tritan plastic.