jomon
adjective
jo·mon ˈjō-ˌmän 
often capitalized
: of, relating to, or typical of a Japanese cultural period from about the fifth or fourth millennium b.c. to about 200 b.c. and characterized by elaborately ornamented hand-formed unglazed pottery
Word History
Etymology
Japanese jōmon, literally, straw rope pattern; from the decoration on the pottery
First Known Use
1943, in the meaning defined above