Bridge to The Gods: Tales from Kyushu has a chapter in which the actual island that Fleming chose as Bond’s hiding place is revealed. The cliff where Shatterhand’s castle was located is opposite the island. A search for Kissy Suzuki reveals some information about the diving girls many years ago. Book is available at www.ryanpub.com.au
Many thanks. The island is called Himeshima, part of Itoshima City. Anyone wanting to visit is welcome to let me know.