highlight(s): The fitting edges are angled at 45 degrees so that the lid sits tightly on the case. Comes with a wooden butter knife. An Asahikawa Woodworking Product descriptions: "KAKUDO" means "angle" in Japanese. Certain variations of angles give the tableware unique functions and forms. Every corner and/or edge is finished to give a round shape with gentle details. A series of articles for daily use with "kakudo (angle)" and a round finish.