wrapping (something) in a bamboo mat; wrapping someone in a bamboo mat and throwing them into a river (unofficial Edo-period punishment)
drainboard; floor grates; duckboard; slatted wood (e.g. used as a base for storing futons inside a cupboard)
wrapping (something) in a bamboo mat; wrapping someone in a bamboo mat and throwing them into a river (unofficial Edo-period punishment)