This bar chart displays the populations of the top 10 countries featured in One Piece episodes, based on 2019 data loaded from a CSV file. The visualization shows horizontal bars with blue grid lines, where each bar’s length encodes population magnitude using a linear scale. The React application uses `useState` and `useEffect` to fetch and parse the data, then renders the SVG elements directly with JSX, while D3’s `scaleBand`, `scaleLinear`, and `max` utilities handle the layout and scaling calculations.