Latest Issue

Journal of Geography (Chigaku Zasshi), 2023 Vol.132 No.1

2023 Vol.132 No.1

Investigating a Sea Arch (Megane Cave) Formed at Mado-Shima Island, San’in Coast

Wave erosion produces a variety of marine cavernous forms along rocky coasts. The San’in Coast is a ria coast composed of extensive rocky cliffs that include more than one hundred marine caves. The cover image shows a sea arch formed at an island composed of rhyolite rocks, which was taken using a camera mounted on an UAV. A small boat (lower-right corner) was used for investigating marine caves at inaccessible sea cliffs or offshore islands. We measured the strength and structure of bedrock from the bow of the boat and launched an UAV from the boat to take aerial images from various directions. These aerial images were combined to produce 3-D models of cavernous forms, from which topography and rock structure were analyzed.

(Photograph: Takuro OGURA, Photographed on September 26, 2022; Explanation: Norikazu MATSUOKA)

Review Article

Geochemical Characteristics of Non-volcanic Type Hot Spring Waters Related
 to Regional Tectonics in Japan


Journal of Geography (Chigaku Zasshi), 2023, 132(1), 1.


Original Articles

Characteristics of Precipitation at Haha-jima, Ogasawara (Bonin) Islands
 in Comparison with Those at Chichi-jima


Journal of Geography (Chigaku Zasshi), 2023, 132(1), 17.


Geological Controls on Marine Cavernous Landforms
 along Japanese Pacific-side Rocky Coasts

Kanami SHINOHARA, Atsuya ITO,
Takuro OGURA and Norikazu MATSUOKA

Journal of Geography (Chigaku Zasshi), 2023, 132(1), 33.


Short Article

Zircon U–Pb–Hf Isotopes and Whole-rock Geochemistry of Rhyolite and Tuff
 from the Harachiyama Formation, North Kitakami Mountains, NE Japan

Takuya HARADA, Mitsuhiro NAGATA, Yasuhiro OGITA,
Saya KAGAMI and Tatsunori YOKOYAMA

Journal of Geography (Chigaku Zasshi), 2023, 132(1), 57.