He was the first explorer to visit New Zealand and the eastern coast of Australia.?

The first explorer to visit New Zealand and the eastern coast of Australia was Captain James Cook. He arrived in New Zealand in 1769 and later charted the eastern coastline of Australia during his first voyage to the Pacific. His expeditions significantly contributed to European knowledge of these regions and paved the way for subsequent exploration and colonization. Cook's detailed maps and observations were crucial for navigation and understanding of the Pacific territories.