A long, narrow, rectangular tile cover used to protect the edge of a hip rafter from weathering. It is conjectured that these tiles were set into the angle made by the sides of the hip rafter and the tile roof surface to prevent rainwater from seeping under the roof tiles. The tail end of the protective cover usually has a right angle cut to fit over the eave support *kayoi 茅負. The upper edge is made high on one such tile unearthed at the site of Naniwa-no-Miya 難波宮, Osaka, to let rainwater run off easily.
One found at Yakushiji 薬師寺 in Nara is decorated with *renjumon 連珠文, a bead motif at the top and bottom. It has a flower-like cloud pattern kaunmon 花雲文 on the surface in between the boards. The tile is short and has a lip *tamabuchi 玉縁 at the tail end, indicating that it was joined to another tile of the same type. Another example from the Heian period, unearthed at Rokuharamitsuji 六波羅密寺 in Kyoto, is decorated with a thunderbolt pattern and ritual implements used in the esoteric Shingon 真言 and Tendai 天台 sects. It was found along with an eave-end tile *nokimarugawara 軒丸瓦 with a circular pendant *gatō 瓦当 attached and ornamented with a Sanskrit character *bonjimon 梵字文.
Yakushiji Kondō 薬師寺金堂 (Nara)