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.