The Hundred Islands are a group of over 7,000 islands in the Pacific ocean, formerly known as Indonesia. Some of the numerous islands in the archipelago are Java, Maluku, Halmahera, and Palau Pinang. It is mentioned several times in the series, but never visited. It is home to some raft cities, but mainly Anti-Tractionists. When the raft city Marseilles planned to invade the anti-tractionists in the Hundred Islands, it was sunk by Anna Fang.