Notes on Stomach Contents of Japanese Weasels (Mustela itatsi) in Ibaraki, Japan

1 Carnivore Ecology and Conservation Research Group, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu-city, Tokyo 183-0054, Japan 2 Ibaraki Nature Museum, Zoological Laboratory, 700 Osaki, Bando-city, Ibaraki 306-0622, Japan 3 Seian University of Art and Design, Oginosato-Higashi 4-3-1, Otsu-city, Shiga 520-0248, Japan 4 Chikushi Jogakuen University Junior College, 2-12-1, Ishizaka, Dazaifu, Fukuoka 818-0192, Japan