tsuma kudarimune 妻降棟

Also shortened to tsumakudari 妻降; also called hafu kudarimune 破風降棟 or shortened to hafukudari 破風降. Two ridge-like structural elements that extend from the base of the gable pediment *tsuma 妻 and slope down toward the eaves *noki 軒, according to the patch of the hip-and-gable roof *irimoya yane 入母屋屋根. These ridges have a bargeboard *hafu 破風 on each side, and terminate beyond the ends of these bargeboards. 

They are made of stacked layers of flat tiles *noshigawara 熨斗瓦, crowned at the top with coping tiles *fusumagawara 伏間瓦, and finished at the outer ends with ogre tiles *onigawara 鬼瓦, and bird perch tiles *toribusuma 烏衾. These ridges, which are decorative rather than structural, became commonly used after the 13th century.