Zelkova serrata
The vegetation of the Palace was monitored with Ikonos satellite (March 10, 2000) and LandStat satellite (July 25, 1999). Evergreen, broad-leafed species such as "Cinnamomum camphora", "Machilus thunbergii", and "Lithocarpus edulis" were differentiated from temperate deciduous trees, such as cherry blossoms, "Quercus acutissima", "Zelkova serrata" and "Acer palmatum".　Temperature changes were monitored with the LandStat satellite. It was suggested that the Palace interfered with the urban heat island phenomenon.