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Journal of Geography (Chigaku Zasshi), 2020 Vol.129 No.5

2020 Vol.129 No.5

Landslide Caused by the July 2020 Torrential Rain in the Southern Part of Kumamoto Prefecture

Intense rainfall related to a stationary front on July 3－4, 2020 triggered many landslides and floods in the southern part of Kumamoto Prefecture, Kyushu, southwestern Japan. The July 4, 2020 landslides were concentrated mainly in Ashikita and Tsunagi towns along the Yatsushiro Sea, resulting in severe damage to houses and twelve fatalities. The landslides occurred mainly in areas underlain by Jurassic accretionary complexes of the Chichibu Belt, with some of them occurring on steep upper slopes along valleys mobilized into debris flows, which traveled along stream channels and flooded the lower reaches. Most of the landslides occurred in thick weathered soil layers overlying bedrock; the slides were generally less than 20 m thick. The photograph shows a landslide that occurred on a 30° forested slope at Miyanoura (Ashikita town). The height and width of the landslide were 70 m and 40 m, respectively. A thick reddish soil layer can be seen at the head scarp, and a fault fracture zone is observed at the lower part of the landslide. Although the landslide produced large amounts of sediments and woody debris, there were no houses in the transported and depositional zone.


(Photograph & Explanation: Yasuo MIYABUCHI; July 12, 2020)

Review Article

Perspectives on a Seamless Marine–lake Sediment Coring Study in East Antarctica

Yusuke SUGANUMA, Takeshige ISHIWA, Moto KAWAMATA,
Jun’ichi OKUNO, Kota KATSUKI, Takuya ITAKI,
Osamu SEKI, Heitaro KANEDA, Hiroki MATSUI,
Yuki HANEDA, Masakazu FUJII and Daisuke HIRANO

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 591.

DOI:10.5026/jgeography.129.591

Original Articles

The Ainu People’s Recognition of the Eruption Process of Mt. Usu
　in Hokkaido, Northern Japan: Superstition and Scientific Thinking

Masatoshi ENDO

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 611.

DOI:10.5026/jgeography.129.611

Sustaining Sports Training Camps Using Accommodation–Team–Travel
　Agent Relationships:
　The Case of Hirano, Yamanakako Village, Yamanashi Prefecture

Eiki WATANABE

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 635.

DOI:10.5026/jgeography.129.635

Special Issue: Groundwater in Mt. Fuji (Part 2)

Overview of the Special Issue “Groundwater in Mt. Fuji (Part 2)”

Masaya YASUHARA, Takeshi HAYASHI, Kazuyoshi ASAI,
Mieko UCHIYAMA and Takashi NAKAMURA

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 657.

DOI:10.5026/jgeography.129.657

Preface for the Special Issue on “Groundwater in Mt. Fuji (Part 2)”

Masaya YASUHARA, Takeshi HAYASHI, Kazuyoshi ASAI,
Mieko UCHIYAMA and Takashi NAKAMURA

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 661.

DOI:10.5026/jgeography.129.661

Water Sources of Lake Bottom Springs
　in Lake Kawaguchi, Northern Foot of Mount Fuji, Japan (Original Article)

Shinya YAMAMOTO, Takashi NAKAMURA, Yukihiko SERISAWA,
Seiji NAKAMURA, Taisuke YASUDA and Takashi UCHIYAMA

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 665.

DOI:10.5026/jgeography.129.665

Understanding the Groundwater Flow System at the Northern Part of Mt. Fuji:
　Current Issues and Prospects (Original Article)

Takeshi HAYASHI

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 677.

DOI:10.5026/jgeography.129.677

Hydrogeological Structure and Hydrological Characterization
　in the Northern Foot Area of Fuji Volcano, Central Japan (Original Article)

Takashi UCHIYAMA

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 697.

DOI:10.5026/jgeography.129.697

Interpreting Groundwater Chemistry and Estimating Residence Time
　of Groundwater in the Mt. Fuji Area Based on a Dissolution Kinetics–Fluid Flow Model
　and Chlorofluorocarbons (CFCs) Concentration (Original Article)

Naotatsu SHIKAZONO, Kazuo OTOMO,
Kazuyoshi ASAI and Masataka NAKATA

Journal of Geography (Chigaku Zasshi), 2020, 129(5), 725.

DOI:10.5026/jgeography.129.725

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