Rokkenjima is a fictional island on which most of the action in Umineko no Naku Koro ni series takes place. It is small and secluded, lying just off the coast of Japan. Rokkenjima measures roughly 10km around and is covered mostly by forest, save for the mansion grounds as well as the grounds of a smaller, separate mansion. The design of the exterior of the main mansion's guest house is based on a mansion in Kyū Furukawa Gardens in Kita, Tokyo.
Rokkenjima is owned by and home to the main branch of the extremely wealthy Ushiromiya family. In the past, it was once called Azukijima and was said to have dwelled by evil spirits until a travelling monk pacified the island by building a shrine on top of a rock. Kinzo Ushiromiya, the patriarch of the family, lives there with his eldest son Krauss and Krauss' immediate family. Once a year, the other members of the Ushiromiya family travel to Rokkenjima for an annual family meeting. The events of the 1986 meeting, during which everyone on Rokkenjima is killed in a series of bizarre murders, are a central focus of the visual novel series.
Banquet of the Golden Witch Edit
In "Banquet of the Golden Witch", the existence of a smaller mansion called Kuwadorian on Rokkenjima is revealed. In the year 1967, Kinzo had managed to trap Beatrice in a human body and seal her memories. The human Beatrice lived in Kuwadorian alone. Rosa chanced upon this mansion one day, and invited the human Beatrice out of the mansion to "see the outside world", only to have the human Beatrice fall off a cliff and die. Upon her death, Beatrice regained all her memories and powers.