New Zealand it operates the Scott Base research facility. New Zealand nationality law treats all parts of the realm equally, so most people born in New Zealand, the Cook Islands, Niue, Tokelau and the Ross Dependency are New Zealand citizens. New Zealand is located near the centre of the water hemisphere and is made up of two main islands and a number of smaller islands. The two main islands (the North Island, or "Te Ika-a-Māui", and the South Island, or "Te Waipounamu") are separated by Cook Strait, wide at its narrowest point. Besides the North and South Islands, the five largest inhabited
Tsushima Strait in the world. The strait measures approximately 100 kilometres along Tsushima Island and is about 65 kilometres wide at its narrowest. The strait has a depth of about 140 metres and is bounded by the "Tsushima Islands" to the west through north (of "Gotō Islands"). Nearby Iki Island lies in the strait about 50 kilometres towards Kyūshū from the southern tip of Kamino-shima (South Island). A warm branch of the "Kuroshio Current" passes through the strait. Originating along the Japanese islands, this current passes through the Sea of Japan then a branch eventually flowing into the Pacific Northern Pacific Ocean