These islands were directly administered by Tokyo Prefecture because they had a small population and because people from Europe and America lived in Ogasawara Islands, and towns and villages were not set until much later.
人口が少ないことや、小笠原諸島には欧米系住民の居住などもあり、東京府による直接の行政運営がなされ、町村の設置は大幅に遅れた。