Interesting that hemp has long had so many varied uses in Japan except the most obvious one for the leaves and buds.
I found this graphic trying to learn the name of the straw-like material used to wrap up Obon offerings for burning. It was only when I saw the photo that I discovered that some of the items used at Obon are made from the stalk of the hemp plant, or asa.
〖植物, 繊維〗hemp ; 【亜麻】flax ; 【黄麻】jute ; 〖布〗hemp cloth ; 【亜麻の】linen ; 〖糸〗twine.
The rope, asanawa, the chopsticks, asagara-bashi, and asagara, which are used as kindling in the mukaebi fires that greet the souls of the dead, are all made of hemp. The mat in which all the offerings are rolled up and then burned is called makomogoza (真菰ご座) and is made from makomo, or the stalks of the wild water rice plant.