Japanese Geotechnical Journal 13(3) 237-247 2018 [Refereed]
<p>On July 21, 2009, the torrential rain resulted in debris flow at more than 480 mountain streams in Hofu City, Yamaguchi Prefecture. In the present study, the layered samples were collected using a Geo-slicer at the location of the alluvial flow...
Japanese Geotechnical Journal 13(4) 403-421 2018 [Refereed]
<p>Torrential rainfall occurred around Hiroshima City, in August 2014, leading to large scale debris flows that traveled via mountain streams. The weathered granitic rock in the Hiroshima region is likely to erode further during heavy rainfall, ca...
<p>The geometry/angle of the deeper extension of active fault is one of the fundamental information to evaluate the magnitude of inland earthquake associated with active faulting. The information is mainly revealed by geophysical exploration that ...
Active Fault Research 2018(49) 23-30 2018 [Refereed]
<p> We described newly found fault exposures of the Shiraiwa and Ota faults and obtained dating materials from exposures including that of Senya fault, on which the surface ruptures appeared at the 1896 Rikuu earthquake. Based on radio-carbon dat...
Journal of the Japan Society of Engineering Geology 57(2) 68-79 Jun 2016 [Refereed]
A new outcrop of active structure was observed at the construction site of Tohoku-Chuo Expressway through the Murayama city, Yamagata prefecture. Active structure running across the newly discovered outcrop is one of traces of the western marginal...
Journal of the Japan Society of Engineering Geology 55(4) 166-176 Oct 2014 [Refereed]
 Dainenjiyama fault is a back thrust of the Nagamachi-Rifu fault forming a distinct fold (flexure) scarp across the urban district in the Sendai city, NE Japan. This paper aims to identify detail location of fault, fault feature and displacem...
The Kuromatsunai Lowland fault zone is a 32 km-long, reverse fault zone which develops through the Kuromatsunai Lowland, southwest Hokkaido. This is a complexed fault zone consists of a series of reverse faults trending approximately north–south. ...
We visited Juo and Kashima (Ibaraki) and Hasunuma (Chiba) a few days after the 2011 earthquake off the Pacific coast of Tohoku. The tsunami left sandy deposits in paddy fields and on paved roads in the study sites, and the deposits comprise graded...
In this paper, we describe distribution and activity of the Nanshozan active fault group (F1, F2 fault) in detail, based on geomorphic feature and surface geology (Plio-Pleistocene Siwa Formation), including the active reverse fault passing throug...
We compiled a database on fault slip distribution along the 98 major active fault zones in Japan selected for National Seismic Hazard Maps for Japan by The Earthquake Research Committee, the Headquarters for Earthquake Research Promotion, Data wer...
In contrast to strike-slip faults, relationship among geometrical features and controls on fault rupture, growth, and segment linkage of reverse faults is poorly known although the detailed mapping of active faults and its data on GIS format enabl...
An outcrop of the Senya fault, which moved associated with the Rikuu Earthquake in the year of 1896, was newly exposed on the west foot of the Senya hill at the Bodaizawa valley floor, Misato-town, Akita Prefecture (figs. l and 2). The fault dips ...
The active fault system along the eastern margin of the Shonai plain is a reverse active fault system that extends NS for 40-km long along the western flank of the Dewa hills, northwestern Yamagata prefecture. The subsurface geometry of this fault...
Kimura Haruo, Ogino Sumiko, Kagohara Kyoko, Oda Shin, Node Katsuya, Ikawa Takeshi, Sato Hiroshi, Ito Tanio, Miyauchi Takahiro, Matsuta Nobuhisa, Kawamura Tomonori, Ishiyama Tatsuya, Okada Shinsuke, Kato Naoko
Active Fault Research 2005(25) 85-92 2005 [Refereed]
The North Matsuda fault in the Kozu-Matsuda fault zone is one of the active fault system, showing the largest vertical component of slip rate onshore Japanese islands. The Kozu-Matsuda fault system is considered as a part of the northern margin of...
Kagohara Kyoko, Imaizumi Toshifumi, Yagi Hiroshi, Sato Hiroshi
Active Fault Research 2004(24) 49-52 2004 [Refereed]
An outcrop across the tectonic bulge on the alluvial fan surface was observed in the Obanazawa basin, Yamagata Prefecture. Young fan deposits ( sand and gravel ) of this surface are down warping toward the east, concerned with the inferred thrust ...
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