A group of islands; an archipelago — several islands clustered together geographically.
日本の南に小さな群島が点在している。
Small archipelagos are scattered to the south of Japan.
その群島は美しいビーチで観光客に人気だ。
That archipelago is popular with tourists for its beautiful beaches.
嵐のため群島への船便が欠航した。
Ferry services to the archipelago were canceled due to the storm.