Kandai Doi,^1,2,* Takuya Kato,² Minori Kono,^2,3 Fumiaki Yamasaki,² Shin-ich Hayama<sup>2

1</sup>Department of Wildlife Biology, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki 305-8687, Japan
²Nippon Veterinary and Life Science University, Musashino, Tokyo 180-8602, Japan
³Fuji-Hakone-Izu National Park Office, Ministry of Environment, Hakone, Minami-Ashigara, Kanagawa 250-0522, Japan

^*To whom correspondence should be addressed. E-mail: kandaidoi@affrc.go.jp