Roof Tiles - Iraka

Japanese: 甍 - いらか

〘noun〙① The highest point of a roof. The back of the roof. The ridge. Also, the ridge tiles used on a roof. ※The Chronicles (720) Kamiyo-jo (Mito Honin ) "They peeled off the spotted horses of heaven, dug into the roof tiles of the palace , and threw them away ."② Tiles used on a roof. Also, a tiled roof. ※Heike (before the 13th century) Kanjo: "When the roof tiles break, I burn incense that will never fade in the mist." ※Otogi-zoshi: Urashima Taro (late Muromachi period): "I break the silver embankment, line up the gold shingles , and build a gate." ※Song: Koinobori (Song of the Ministry of Education) (1913): "The waves of roof tiles and the waves of clouds, the hollow of overlapping waves." ③ The triangular wall part under a gable roof. [Japanese Architecture Dictionary (1906)] [Additional notes] The origin of the word has often been explained as being related to "iroko" (scales) in ancient times due to its morphological similarity, but considering that "iraka" did not necessarily refer only to tiled roofs in ancient times, it may be better to look for a cognate relationship with the plant "iraka " (thorns) in terms of the material of ancient roofs.

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙① 屋根のいちばん高い所。屋根の背。上棟。また、屋根に葺(ふ)いた棟瓦(むながわら)。※書紀（720）神代上（水戸本訓）「天の斑駒(ぶちこま)を剥(さかはぎには)ぎて、殿(みあらか)の甍(イラカ)を穿(うが)ち、投(な)げ納(い)る」② 屋根に葺いた瓦。また、瓦葺きの屋根。※平家（１３Ｃ前）灌頂「甍破れては霧不断の香をたき」※御伽草子・浦嶋太郎（室町末）「銀(しろがね)の築地をつきて、金(こがね)のいらかをならべ、門をたて」※唱歌・鯉のぼり（文部省唱歌）（1913）「甍(イラカ)の波と雲の波、重なる波の中空を」③ 切妻屋根の下の、三角形になった壁の部分。〔日本建築辞彙（1906）〕[補注]語源については、その形態上の類似から、古来「鱗(いろこ)」との関係で説明されることが多かったが、上代においては「甍(いらか)」が必ずしも瓦屋根のみをさすとは限らなかったことを考慮すると、古代の屋根の材質という点で、むしろ植物性の「刺(いら)」に同源関係を求めた方がよいのではないかとも考えられる。

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