This work focuses on the explanation and the origins of the most common terms in the field of tsuba, kod??gu, and t??s??gu. Terms from all areas are explained in detail, like z??gan (inlay), hori (carvings), iroe (colouring), sukashi (openings), d??gu (tools), jigane (raw materials), jimen (surface and surface finish), etc. Most of the explanations are supported by illustrations.