To create a map of Japan with locations added, load a txt-file that only contains locations (one for each row) as shown below:
35.69,139.75,1.5,black,Tokyo 31.59,130.66,3,green,Sakurajima 34.99,135.76,2.0
Each row should be on the format
The last two properties can be omitted as shown for the last row (it's Kyoto). To clear selection, reload the page. The blank map can be found here, and was created by Maximilian Dörrbecker and shared with CC BY-SA 3.0.