About 700 people live on seven of the 12 Tokara islands. There are no hospitals on some of these far-flung islands - the nearest is at least six hours by ferry to the prefectural capital, Kagoshima. "You can hear a strange roar from the ocean before the quakes hit, especially at night. It's eerie," Chizuko Arikawa from Akusekijima island told The Asahi Shimbun. "Everyone's exhausted. We just want it to stop," said the 54-year-old, who lives by the sea and runs a cattle farm with her husband. "After so many quakes, it now feels like the ground is shaking even when it's not," said Isamu Sakamoto, 60, head of the local residents' association in Akusekijima. "The quakes start with a jolt from below, then the house sways. It's sickening," he said. In Toshima village, some residents have been sleep-deprived and tired, authorities said, as they urged the media to stop inundating locals with queries.