Tadafusa's butter knife utilizes the environmentally-friendly, antimicrobial carbonized wood, which was born through a special heat treatment patented by Tadafusa.

It is highly resistant to bacteria, and there are no worries about environmental pollution after its disposal. As the material is natural wood, it has warmth and soon becomes familiar with human hands.

It is truly an environmentally friendly butter knife using no chemical treatment, chemical paint, nor resin.