Papers

The recent trend in annual death toll by landslide disasters in Japan

Yoshinori SHINOHARA and Hikaru KOMATSU　3

Estimation of sediment production from weathered bedrock in different lithology due to freeze-thaw action

Hiroaki IZUMIYAMA, Daizo TSUTSUMI and Masaharu FUJITA　10

Technical Papers

Actual condition of sediment discharge and riverbed variation during heavy rain in a mountain stream to have a large-scale landslide : An example of Harukigawa Fujigawa water system Hayakawa

Satoshi NIWA, Taro UCHIDA, Jun-ichi KANBARA, Takeshi MORIYA, Takeo MITSUNAGA and Yoshifumi SATOFUKA　　21

Research Notes

Verifications of the noise reduction by down hole sentinel vibration sensors for “Deep-seated landslide detection and Detectable landslide volume in the Kii peninsula

Tsuneo OHSUMI, Soichi KAIHARA, Ryo SAKAI and Wataru SAKURAI　　32

Formation and developing processes of debris flow resulting from slope failures

Shinji EGASHIRA, Kuniaki MIYAMOTO and Hiroshi TAKEBAYASHI　　38

Sensitivity and dents of hydrophone pipes with different thickness

Yuiko AMANO, Kazuo YOSHIDA, Michinobu NONAKA, Takahiro ITOH and Takahisa MIZUYAMA　　43

Technical Note

Analysis of slope failure characteristics in Uono River Watershed

Shoichi WATANABE, Michiya IRASAWA, Yoshihiko HIRANO, Naoki MIYATA, Toshihiro KIKUI, Eiji TATUTA, Nobuhiro USUKI and Yoshiaki KASIWABARA　　50