scholarly journals Occurrence of endangered tri-spine horseshoe crab in Etajima and Takehara Cities of Hiroshima Prefecture, western Japan

2017 ◽  
Vol 72 (1) ◽  
pp. 16-26 ◽  
Author(s):  
Susumu OHTSUKA ◽  
Naohisa NISHIHARA ◽  
Ryota HIRAYAMA ◽  
Hayato TANAKA ◽  
Yusuke KONDO ◽  
...  
Keyword(s):  
Horseshoe Crab ◽  
Western Japan ◽  
Hiroshima Prefecture

scholarly journals Concentrations of SO2, NOx and O3 and Their Diurnal Variation at Mt. Gokurakuji and Its Vicinity, Hiroshima Prefecture, Western Japan.

2002 ◽  
pp. 67-76 ◽  
Author(s):  
Masaaki CHIWA ◽  
Tsuyoshi HIRAKAWA ◽  
Akihiko NAEMURA ◽  
Takemitsu ARAKAKI ◽  
Hiroshi SAKUGAWA
Keyword(s):  
Diurnal Variation ◽  
Western Japan ◽  
Hiroshima Prefecture

scholarly journals Hiroshima Prefecture geo-disasters due to Western Japan Torrential rainfall in July 2018

2020 ◽  
Vol 60 (1) ◽  
pp. 283-299
Author(s):  
Ryota Hashimoto ◽  
Takashi Tsuchida ◽  
Takeo Moriwaki ◽  
Seiji Kano
Keyword(s):  
Western Japan ◽  
Hiroshima Prefecture ◽  
Torrential Rainfall

Cave Sites of the Jomon Period in Taishaku Gorge, Western Japan

2020 ◽  
Vol 48 (3) ◽  
pp. 43-49
Author(s):  
E. A. Solovyeva ◽  
Y. Murakami
Keyword(s):  
Population Growth ◽  
Bone Tools ◽  
Subsistence Strategies ◽  
Mollusk Shells ◽  
Trade Relations ◽  
Marine Mollusks ◽  
Natural Park ◽  
Western Japan ◽  
Hiroshima Prefecture ◽  
Sea Coast

We describe the largest group of cave sites in Japan known to date. It includes some 50 sites, located in a gorge within the area of the modern Taishaku National Natural Park. Their characteristics are provided and their relevance to the study of the early stages of the Jomon Period is assessed. The study is based on publications, fi eld reports, and samples of artifacts owned by the museums in the Hiroshima Prefecture. The focus is on cave sites in the Chugoku region, their location, structure, inner space, and utility zones in the adjoining territory. Special attention is paid to the reconstruction of sequence in which parts of the cave space were exploited at different stages of the Jomon Period. Archaeological fi nds are described in detail—stone and bone tools, potsherds, and mollusk shells. Their analysis suggests that the Jomon people who lived in those caves subsisted mostly by hunting and freshwater mollusk collecting. Shells of marine mollusks and tools made of sanukite, which is unavailable in the area, indicate trade relations between cave dwellers and people of the adjoining regions, including the sea coast. A conclusion is made that population growth and greater reliance on hunting and fi shing territories rich in vegetation led to the change in lifestyle and subsistence strategies of the Jomon people.

scholarly journals Distribution and Characteristics of Slope Movements in the Southern Part of Hiroshima Prefecture Caused by the Heavy Rain in Western Japan in July 2018

2019 ◽  
Vol 14 (6) ◽  
pp. 894-902
Author(s):  
Hideaki Goto ◽  
Yasuhiro Kumahara ◽  
Shoichiro Uchiyama ◽  
Yoshiya Iwasa ◽  
Tomoru Yamanaka ◽  
...  
Keyword(s):  
Heavy Rain ◽  
Slope Movement ◽  
Aerial Photographs ◽  
Large Area ◽  
Geospatial Information ◽  
Mountain Ranges ◽  
Slope Movements ◽  
Western Japan ◽  
Hiroshima Prefecture ◽  
Okayama Prefecture

Record-breaking heavy rainfall in July 2018 caused an extremely large number of slope movements over a broad area of western Japan. We mapped the distribution of slope movements in the southern part of Hiroshima Prefecture through an interpretation of aerial photographs that were acquired after the rainfall by the Geospatial Information Authority of Japan, and counted a total of 8,497 slope-movement starting points. The widespread distribution of slope movements – from Etajima City of Hiroshima Prefecture to Kasaoka City of Okayama Prefecture – suggests that the heavy rain affected a very large area. The starting points of debris flow during this disaster were commonly close to the crest of mountain ranges. We compared the distribution of slope movements to the 24-hr rainfall accumulation during the heaviest rainfall event to clarify the factors that caused regional difference in slope-movement distribution. We found the area of highest density of the slope movements was consistent with the area receiving a cumulative rainfall of >250 mm. This observation indicated that the position of slope-movement starting points was not related to differences in geology.

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