蛇籠 ・ じゃかご ・ jakago
A round/cylindrical woven bamboo basket filled with stones to control the flow of water in a river or to protect the embarkment. Gabion. The round-shaped baskets are often shown half-submerged in combination with a water or ryusui (流水) pattern. The basket is woven in the kagome pattern.
This type of basket is also called sekiro (石籠・せきろう).