noun
archipelago; group of islands
A geographical noun for multiple islands considered as one group. It is often attached to a place name, as in 伊豆諸島 or フィリピン諸島.
夏に伊豆諸島を訪れた。
I visited the Izu Islands in the summer.
この諸島には火山島が多い。
This archipelago has many volcanic islands.