It is more suitable Siu Kiu. It is the name of a fictional city, which appears in the short story "History of a Princess, her father and Prince Kinoto Fukasuka" by the Argentine writer and composer Maria Elena Wash.
SIU KIU (and not SIUKIU) is a fantastic place in a Japanese tale, where the Moon comes down to earth and takes a girl, Ruma to know this enchanted country.