noun
gambling mat (for dice games)
A mat used for dice gambling, historically associated with the Bon festival period.
盆茣蓙の上でさいころを振る。
They roll dice on the gambling mat.
noun
altar mat for Bon festival offerings
A mat placed on a Buddhist altar during the Bon festival to hold offerings for ancestors.
お盆には盆茣蓙を敷いて供物を並べる。
During Bon, they spread the altar mat and arrange offerings.
Compound of 盆 (Bon festival) and 茣蓙 (goza, a woven rush mat). The mat's use in both gambling and religious offerings during the Bon season is reflected in the two senses.