I can't speak for how it affects the data, but note that Kyoto city (京都市, the administrative area to which this data seems to apply) is about two-thirds mountai

I can't speak for how it affects the data, but note that Kyoto city (京都市, the administrative area to which this data seems to apply) is about two-thirds mountains and small rural towns. See the satellite image here (there should be a red border around Kyoto city): https://goo.gl/maps/FZZbj7UFi4m https://goo.gl/maps/FZZbj7UFi4m