Insects

 Some hundreds of species have been recorded, among them 74 species of butterfly, 33 species of dragonfly and damselfy, and 120 species of longhorn beetle. The number of recorded species will surely increase with cntinued surveys. Some species, such as common hawker dragonfly(Aeschna juncea juncea), hawker dragonfly(Planaeschna milnei), jewel beetle(Eurythyrea tenuistiata), large tiger longicorn beetle(Xylotrechus villioni) and red-banded longicorn beetle(Akajimatora bella), are very rare in Tokyo. The large spring tiger butterfly(Luehdorfia japonica), has been declared extinct here, while on the other hand some invasive or warm-climate species such as assassin bug(Agriosphodrus dohrni), ramie longicorn beetle(Paraglenea fortunei), and dark evening brown buterfly(Melantis phedima oitensis), are firmly establishied in this garden.