e/Burdock piling

Information
has gloss	eng: Burdock piling is a technique of Japanese wall building used to build castles, such as Osaka Castle and named after the resemblance to the Japanese burdock plant. Large rocks are fitted together over a mound of earth, and the remaining cracks are filled in with pebbles. This stone fill is called from their small size.
lexicalization	eng: Burdock piling
instance of	c/Japanese architectural features