concave roof tile; flat tile
A flat or slightly concave tile used in traditional Japanese roofing, often paired with convex 丸瓦 (marugawara).
See also: 丸瓦
On the roof of this temple, flat tiles and round tiles are used alternately.
Compound of 平 (hira, 'flat') and 瓦 (kawara, 'roof tile'). The reading ひらがわら follows standard rendaku voicing.