Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Volcano Islands (kanji: , Kazan Rett ) is a group of three Japanese islands south of the Bonin Islands that belong to the municipality of Ogasawara. The islands are all active volcanoes lying atop an island arc that stretches south to the Marianas.The islands were uninhabited until 1889, when the two northern islands were settled by Japanese settlers from the Izu Islands. They were annexed by Japan in 1891.