Lit. hip or haunch.
1 The wainscoting, or wooden panelling, below the mid-point of a wall, or the panel board on the lower part of a sliding screen *shōji 障子. Sometimes these panels slide open for air circulation or garden viewing. When the upper part of a wall is treated differently than the lower part, the lower part is also called koshi. Koshibame 腰羽目 refers to wainscots up to 1 m from the floor level. Sometimes baseboard wood paneling and finishing trims are called koshi-ita 腰板.
2 The projection on the bottom part of a haunch tenon *konehozo 小根ほぞ is called koshi.
3 The mid-part of the roof or bargeboard *hafu 破風, where the sag occurs is called koshi. It is about the mid-point of its overall length, i.e., from peak to bottom edge.
a) *ogami 拝 b) *hafu-ita 破風板 c) koshi 腰 d) *hikiwatashi kōbai 引渡勾配
4 The middle of a bracket *hijiki 肘木 in a vertical direction is also called the koshi. See *koshinuki 腰貫, *koshinageshi 腰長押, *koshidaka shōji 腰高障子.
5 See *kamachiza 框座.