Also kazunemaru 重ね丸. An interjacent tile. A section of a semi-cylindrical roof tile laid between the first broad concave roof tile *tonehiragawara 刀根平瓦 and the uptilted side of the first semi-cylindrical tiles, *marugawara 丸瓦. It closes the wide gap between the tonehiragawara and the next broad, concave tile, *hiragawara 平瓦. The gaps between following hiragawara are not as wide and therefore were bridged by ordinary semi-cylindrical tiles. The problem of rainwater leaking in under the tiles became especially serious with the advent of the drooping verge *minokō 箕甲 along the gable bargeboard, *hafu 破風, around the end of the 12th century. It is believed the use of the interjacent tile continued until the late 16th or early 17th century, after which the two tiles were united into one long sleeve *sodemarugawara 袖丸瓦. This advancement allowed the sleeve length to be adjusted, resulting in a wide variety of drooping verge shapes.