This visualization displays the population of Japanese prefectures as a scatter plot, with each circle representing a prefecture positioned by population size on the x-axis and prefecture name on the y-axis. The chart uses React components to render SVG elements, with d3.scaleLinear for both axes and d3.csv for loading data from a GitHub-hosted dataset derived from United Nations World Population Prospects 2019. Circle marks include native SVG title tooltips showing formatted population values, and the styling uses custom CSS with the Poppins font.