n Kanagawa prefecture, the endangering of Tokyo-salamanders (Hinobius tokyoensis) in the Miura peninsula（lat. 35°16-12’　Long. 139°　34-42’), from damaging and deteriorating the habitat environment, has been worried. Our group , The Study of Miura-peninsula Natural History, has been paying attention to the living conditions and conservation of Tokyo salamanders. "Kaneda and Ohno (1998) " indicated that Tokyo salamanders are inhabiting 14 districts and their population was around 1000 during our investigation in 1997.
The habitat become worse from 1998 because of 1) habitat loss from development, 2) aridity of wetland habitat of larva jand devastation of forest(habitat of adult) decreasing the cultivation of rice paddies, 3) over-hunting adults and eggs by traders, 4) effect of invasive alien species such as Raccoons, 5) being hybridized with another haplotype salamander by inappropriate nature conservation action. Some people set larva free in the water area, which is not where they were originally collected but somewhere else. That is a problem of conserving genetic diversity (OUR ACTION/CLICK!）.
In 2003, we observed only 8 eggs on wetland where about 100 ~ 300 eggs used to be spawned. Adults dead bodies eaten by something, and broken egg-sacs were also found. We suspected that raccoons were preying them, so we set an automatic censor-camera around the pond. We obtained results of 72 cases with 8 species of animals, and raccoons were involved in 56 cases, 77.8%.