Mokuzu Island

Mokuzu Island is an island used by travelers to resupply on stocks and weapons. Shikamaru and Tenten went there to buy the tools for the Fourth Shinobi World War, by storing them inside of Tenten's Scrolls. Island has a shape of the moon, where the two sides almost form a closed circle. The water between the sides is calm. The island is the habitat of criminals, expecting travelers. They power some steam machines and wait for the mist to rise, whirlpools and rocks to emerge. They wait for the ship to sink, and then wait for the valuables to float so they could claim them.