Land of Wano

Wano Country only has two known methods of entry from the ocean.[66] The Climbing Koi Waterfall (鯉の登る滝, Koi no noboru taki?),[67] which is the hardest one, involves tying ships to the giant koi that routinely climb up the surrounding waterfalls from the sea, allowing the fish to pull them along.[63] The other method involves entering a hidden tunnel located behind one of the waterfalls, which leads to the Mogura Port, where people and cargo can get transported inland through a gondola. The latter method, however, was restricted to those who were granted permission by either Kaidou or Orochi during their reign.[66] Those limited ways of access, as well as the vicious currents located in the inner and outer seas of Wano, mean that the country is naturally near impenetrable, with shipwrecks being a common sight.[68] After Kaidou's takeover, a defense system was installed in the sea stacks in Wano's outer seas, consisting mostly of manually-operated cannons.[69]

Wano Country features a river that splits and divides the land into six areas called regions, and it also included the nearby island Onigashima.[62] During the Kozuki Family's rule, each region was ruled by a daimyo, although Kuri was lawless until Kozuki Oden was appointed daimyo.[70] When Orochi took power, Oden was executed and the other daimyo all lost their positions after staging a failed rebellion against Orochi.[71] Until the Beasts Pirates' defeat, Jack was considered to be Kuri's ruler while Queen was considered to be the ruler of Udon. It is unknown if any of the other regions have designated rulers.[72]. Wano Country is a volcanic island located above an underground magma chamber (マグマ溜まり, maguma-damari?). After the structural integrity of the island suffered from the displacement of Onigashima and two large craters reaching all the way to the chamber, the ground beneath Onigashima's original location cracked and gave way for the magma to rise to the surface. This resulted in a massive underwater volcanic eruption in the freshwater reservoir around Wano Country.[73].