Featured image of post 日本地図カルトグラム

日本地図カルトグラム

A tool for easily creating Japan map cartograms

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What is this tool?

A web-based tool that lets you easily create cartograms reflecting statistical data for each prefecture of Japan. A cartogram is a type of thematic map that distorts the area and shape of regions on a map according to statistical values (such as population, votes, or other indicators). It visually highlights regional differences and disparities that are hard to see on a standard map.

Features

  • Japan map cartogram generation: Displays regions such as prefectures with their areas distorted according to statistical values.
  • Data value reflection: Map shapes change based on the data you input.
  • Ranking mode: Automatically generates ranking data sorted by value in descending order. Ranking data can be used for color coding.
  • Interactive display: Browse and interact with the map on the web.
  • Export as PNG or SVG images

How to use

    1. Specify your data…Upload or enter numerical data by region in CSV format (e.g., population, GDP, vote counts).
    1. Generate the cartogram…Based on the specified statistical values, a distorted cartogram of the Japan map is generated and displayed on screen.
  1. Adjust and review…Adjust parameters (color, degree of distortion, region label display, etc.) as needed and review the results.

Data formats

  • Tabular data (CSV)
Last updated on 2026-03-06