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Enter prefecture names separated by spaces, line breaks, or commas to show those prefectures in color on the map of Japan. Example：Tokyo 大阪 nagano
Add a color code after a prefecture name to choose its fill color. Example: Tokyo#ff66bb
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Map data uses Geolonia / prefecture-tiles prefectures.geojson.
Map data: Geolonia prefecture-tiles
Small islands are omitted because this is a simplified map.