Also shikimen kamatsugi 敷面鎌継. A half-lap, gooseneck tenon joint. An end joint which combines two joints: a half-lap *koshikaketsugi 腰掛継 and a gooseneck tenon joint *kamatsugi 鎌継. The gooseneck mortise and the bench, or seat, of the lap joint are cut so that the mortise occupies about half the thickness of the timber. The bench made from the remaining half extends like a step beyond the mortise. The second timber contains the gooseneck tenon; the undercut overlaps the bench when the tenon is dropped into place in the corresponding mortise. If a half-blind mortise, mechigaihozoana 目違ほぞ穴, is cut vertically into the center of the bench and a matching tenon is made on the undercut part beneath the dovetail, the combination joint is called koshiire mechigaitsuki kamatsugi 腰入目違付鎌継. The half blind tenon prevents damage from twisting forces. Koshikake kamatsugi is based on the same principles as *koshikake aritsugi 腰掛蟻継; only the shape of the tenon and mortise differ. Frequently used to join two hidden purlins (roof joints) *nogeta 野桁, and foundation footings *dodai 土台.
