Procambarus clarkii
In the moats, "Palaemon adspersus", "Macrobrachium", nukaebi ("Paratya improvisa") and "Procambarus clarkii" were found, in many numbers except "Macrobrachium". "Procambarus clarkii" was not obtained in the Dokan Moat. In the eastern Garden, a crab, sawagani or ("Geothelphusa dehaani") was confirmed. In the moats, parasitic crustaceans were found in stone moroko, "Carassius auratus langsdorfii", "Carassius cuvieri" and in some shrimps. As land living crustaceans, 16 species of Isopoda and two species of Gammaridea were found. The most common Isopoda was Tokyo koshibiro dangomushi which is usually found in deep woods. Three species of Harpacticoida were found from the soil, indicating a stable circumstance of the Palace like woods in the mountains.