KOSAKI Takashi

J-GLOBAL         Last updated: Jun 9, 2016 at 11:37
KOSAKI Takashi
Tokyo Metropolitan University
Faculty of Urban Environmental Sciences Division of Nature-and Culture-based Tourism
Job title
Doctor of Agriculture(Kyoto University)

Research Areas


Academic & Professional Experience

Professor, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
Professor, Graduate School of Global Environmental Sciences, Kyoto University
Professor, Graduate School of Agriculture, Kyoto University
Professor, Faculty of Agriculture, Kyoto University
Associate Professor, Faculty of Agriculture, Kyoto University
Assistant Professor, Obihiro University of Agriculture and Veterinary Medicine
Research Scientist, International Institute of Tropical Agriculture (Nigeria)
Assistant Professor, Faculty of Agriculture, Kyoto University


Agricultural Chemistry, Graduate School, Division of Agriculture, Kyoto University
Agricultural Chemistry, Faculty of Agriculture, Kyoto University

Awards & Honors

Jun 2014
Award of Excellence, The First International Soil Judging Contest
Apr 2013
"'Fallow Band System,' a land management practice for controlling desertification and improving crop production in the Sahel, West Africa", Soil Science and Plant Nutrition (SSPN) Award 2012, Japanese Society of Soil Science and Plant Nutrition
Apr 2010
"Soil microorganisms have a threshold concentration of glucose to increase the ratio of respiration to assimilation", Soil Science and Plant Nutrition (SSPN) Award 2009, Japanese Society of Soil Science and Plant Nutrition
Jun 2010
"Sediment catcher to trap coarse organic matter and soil particles transported by wind", 2010 ASABE Honorable Mention Paper Award, American Society of Agricultural and Biological Engineers
Apr 2006
"Spatial variability of organic matter dynamics in the semi-arid cropland of Northern Kazakhstan", Soil Science and Plant Nutrition (SSPN) Award 2005, Japanese Society of Soil Science and Plant Nutrition
Encouragement Award of Japanese Society of Soil Science and Plant Nutrition

Published Papers

Kozue Sawada, Kozue Sawada, Shinya Funakawa, Takashi Kosaki
Applied Soil Ecology   103 13-21   Jul 2016
© 2016 Elsevier B.V. Many surface soils, including those that have rarely experienced dry conditions, may experience more frequent and/or intense drying-rewetting (DRW) events in the future. Such DRW events are likely to induce large and sudden CO...
CAO Le, 伊ケ崎健大, 伊ケ崎健大, 角野貴信, SIRIGULENG, 杉原創, 小崎隆
ペドロジスト   59(2) 52-62   Dec 2015
ペドロジスト   59(2) 41-51   Dec 2015
Kozue Sawada, Shinya Funakawa, Koki Toyota, Takashi Kosaki
Soil Science and Plant Nutrition   61(6) 917-926   Nov 2015
© 2015 Japanese Society of Soil Science and Plant Nutrition. Microbial nitrogen (N) immobilization following the addition of organic materials to soils regulates soil N availability, which affects plant growth and N leaching from soils. In this st...
Watanabe Tetsuhiro, Hase Emiko, Funakawa Shinya, Kosaki Takashi
Soil Science   180(3) 97-106   Mar 2015
Slow release of added phosphate in soils is of fundamental importance for plant nutrition and pollution in aqueous environments. The diffusion of phosphate in micropores and mesopores after desorption from the inside surface of pores is the most l...
Soh Sugihara, Soh Sugihara, Shinya Funakawa, Atsunobu Kadono, Yusuke Takata, Kozue Sawada, Kazumichi Fujii, Takashi Kosaki
Soil Science and Plant Nutrition   61(3) 392-403   Jan 2015
© 2015 Japanese Society of Soil Science and Plant Nutrition. Abstract: The wet–dry cycles of soil primarily drive carbon (C) dynamics in dry croplands that mainly experience sporadic rainfall events. We evaluated the in situ short-term (hourly) dy...
C. Le, K. Ikazaki, S. Siriguleng, A. Kadono, T. Kosaki
IOP Conference Series: Earth and Environmental Science   18    Jan 2014
The recent increase in the number of tourists has raised serious concerns about grassland degradation by tourism activities in Inner Mongolia. Thus, we evaluated the effects of tourism activities on the vegetation and soil in Hulunbuir grassland. ...
Chie Hayakawa, Chie Hayakawa, Shinya Funakawa, Kazumichi Fujii, Kazumichi Fujii, Atsunobu Kadono, Takashi Kosaki
Biology and Fertility of Soils   50 633-643   Jan 2014
Cellulose decomposition experiments were conducted under field conditions to analyze the effects of climatic and soil properties on rates of organic matter decomposition in temperate and tropical forests. The mass loss rates of cellulose filter pa...
Trop Agric Dev   58(1) 8-17 (J-STAGE)-17   2014
Soil carbon (C) and nitrogen (N) dynamics in the Sahel are primarily driven by intermittent rainfall, causing the wet-dry cycles of soil. We analyzed the relationship between in situ short-term C and N dynamics and hourly soil microbial dyn...
NAKAO Atsushi, FUNAKAWA Shinya, KOSAKI Takashi
Clay Sci   17(3) 75-82   Sep 2013
The cation exchange capacity (CEC) derived from octahedral layer charges (OLC) (CEC_<OLC>), the CEC derived from tetrahedral layer charges (TLC) (CEC_<TLC>), and the amount of Al as a hydroxy-Al polymer in interlayer sites (Al_<HIM>) were determin...
Kazumichi Fujii, Kazumichi Fujii, Kokoro Morioka, Ryan Hangs, Shinya Funakawa, Takashi Kosaki, Darwin W. Anderson
Canadian Journal of Soil Science   93(3) 295-304   Aug 2013
Organic acids released by lichen play an important role in mineral weathering and podzolization in the Boreal-Tundra transition zone of Canada; however, importance of low-molecular-weight organic acids in the soil carbon (C) cycle in the black spr...
FUJII Kazumichi, MORIOKA Kokoro, HANGS Ryan, FUNAKAWA Shinya, KOSAKI Takashi, ANDERSON Darwin W.
ペドロジスト   57(1) 27-44   Jun 2013
The soils in Saskatchewan in the Central Interior Plains of Canada vary from semi-arid to sub-humid climates and between parent materials deposited during deglaciation. The Brown and Black Chernozem soils are the zonal soils of the grassland in th...
Kazumichi Fujii, Kazumichi Fujii, Mari Uemura, Chie Hayakawa, Shinya Funakawa, Takashi Kosaki
Soil Biology and Biochemistry   57 109-115   Feb 2013
We investigated the activities of ligninolytic enzymes, lignin peroxidase (LiP), manganese peroxidase (MnP), and laccase (Lac), in forest floor layers collected from temperate and tropical regions in Japan, Thailand, and Indonesia. The effects of ...
Kazumichi Fujii, Kazumichi Fujii, Shinya Funakawa, Chie Hayakawa, Sukartiningsih, Takashi Kosaki
Soil and Tillage Research   126 267-275   Jan 2013
In the humid tropics, conversion of forests into croplands has the potential to alter the flux of dissolved organic matter (DOM) and influence C balance and N availability in soil. Sites located on a clay-rich Ultisol in Thailand and a highly acid...
TANI Masayuki, SHINJO Hitoshi, FUJITAKE Nobuhide, SUMIDA Hiroaki, KOSAKI Takashi
ペドロジスト   56(2) 47-57   Dec 2012
Nakao Atsushi, Funakawa Shinya, Tsukada Hirofumi, Kosaki Takashi
SANSAI : An Environmental Journal for the Global Community   6 17-29   Dec 2012
Caesium-137 (137Cs), with its high release rate and long half life, is the most important longterm contributor to environmental contamination of all the radionuclides released by the accident at the Fukushima Dai-ichi nuclear power plant in March ...
Soh Sugihara, Shinya Funakawa, Tomohiro Nishigaki, Method Kilasara, Takashi Kosaki
Agriculture, Ecosystems and Environment   162 101-107   Nov 2012
Phosphorus deficiency is one of the largest constraints to crop production in tropical African soils owing to low native soil P and the high P fixation capacity of highly weathered soils. To achieve better soil P management, it is necessary to eva...
NAKAO Atsushi, FUNAKAWA Shinya, TAKEDA Akira, TSUKADA Hirofumi, KOSAKI Takashi
Soil Sci Plant Nutr   58(4) 397-403   Aug 2012
IKAZAKI Kenta, SHINJO Hitoshi, TANAKA Ueru, TOBITA Satoshi, FUNAKAWA Shinya, IWAI Kaeko, KOSAKI Takashi
ペドロジスト   55(3) 355-363   Apr 2012
KADONO Atsunobu, KADONO Atsunobu, FUNAKAWA Shinya, KOSAKI Takashi
ペドロジスト   55(3) 442-448   Apr 2012


Takashi Kosaki, Takashi Kosaki, Donald Gabriels, Donald Gabriels
Soil Science and Plant Nutrition   61 371   Jan 2015
Takashi Kosaki, Takashi Kosaki, Takashi Kosaki, Makiko Watanabe, Masayuki Kawahigashi
Soil Science and Plant Nutrition   61 2   Jan 2015
ペドロジスト   58(2) 105-110   Dec 2014
KIMURA Sonoko D., TAKATA Yusuke, FUJII Kazumichi, IKAZAKI Kenta, WASAKI Jun, MORI Keiko, ICHINOSE Yuuri, TANAKA Haruo, KOSAKI Takashi
Journal of the science of soil and manure, Japan   85(2) 168-169   Apr 2014
Kosaki T.
Journal of the science of soil and manure, Japan   85(1) i-ii   Feb 2014
Gicheru Patrick T., Kosaki Takashi, Horn Rainer, Senesi Nicola
Soil science and plant nutrition   60(1)    Feb 2014
Patrick T. Gicheru, Takashi Kosaki, Rainer Horn, Nicola Senesi
Soil Science and Plant Nutrition   60 2   Jan 2014
INUBUSHI Kazuyuki, HATANO Ryusuke, ANDO Ho, MATOH Toru, HIGASHI Teruo, KOSAKI Takashi
Journal of the science of soil and manure, Japan   83(6) 721-722   Dec 2012
KOSAKI Takashi, SAKURAI Katsutoshi
Journal of the science of soil and manure, Japan   83(4) 478-482   Aug 2012

Books etc

小崎 隆, 京都大学大学院地球環境学堂
[Takashi Kosaki]   2005   
What should pedologists contribute towards the security of food and environment in the 21st century? (Plenary paper)
The Proceedings of the International Forum “We shall keep a planet the Earth”, 74-77, The V.V. Dokuchaev Central Museum of Soil Science, St. Petersburg, Russia   2004   
Restoration of Inland Valley Ecosystems in West Africa. (Characteristics of clay minerals, )
Association of Agriculture and Forestry Statistics, Tokyo   2002   
Desertification (Soil Degradation): Causes and Remedies. Plenary Papers of The Proceedings of International Symposium on Combating Desertification “Strategies for Yellowsand Prevention”
Korean Forest Service, Seoul, Korea   2002   

Conference Activities & Talks

日本農学会シンポジウム講演要旨   3 Oct 2015   
角野貴信, 舟川晋也, LAL Rattan, 小崎隆
日本土壌肥料学会講演要旨集   9 Sep 2015   
長縄貴彦, 小崎隆
日本土壌肥料学会講演要旨集   9 Sep 2015   
藤井一至, 早川智恵, 中田裕治, 梅澤究, 吉田誠, 舟川晋也, 小崎隆
日本土壌肥料学会講演要旨集   9 Sep 2015   
渡邉哲弘, 太田頼子, 長谷中洋輔, 浦山慧美, 上田史織, HARTONO Arief, ZE Antonie Mvond, KILASARA Method, 小崎隆, 舟川晋也
日本土壌肥料学会講演要旨集   9 Sep 2015   
北川由佳, 矢内純太, 中尾淳, 藤井彩音, 森塚直樹, 小崎隆
日本土壌肥料学会講演要旨集   9 Sep 2015   
伊ケ崎健大, 真常仁志, 田中樹, 舟川晋也, 小崎隆
日本土壌肥料学会講演要旨集   9 Sep 2015   
Ikazaki Kenta, Shinjo Hitoshi, Tanaka Ueru, Tobita Satoshi, Funakawa Shinya, Kosaki Takashi
Abstracts of the meeting, the Society of the Science of Soil and Manure   11 Sep 2013   
FUJII Kazumichi, FUNAKAWA Shinya, KOSAKI Takashi
日本土壌肥料学会講演要旨集   8 Aug 2011   
Fujii Kazumachi, Funakawa Shinya, Kosaki Takashi
Abstracts of the meeting, the Society of the Science of Soil and Manure   8 Aug 2011   

Teaching Experience



Modeling soil organic matter dynamics of chernozem soils in Kazakhstan, Ukraine, and Hungary.
2001 - 2005
Mechanism of soil salinization under irrigation farming in South Kazakhstan
1996 - 2005

Research Grants & Projects

Ecotourism: New tool for participatory soil and environmental education.
Project Year: 2011 - 2013    Investigator(s): KOSAKI Takashi
The objective of this study was to develop the method of soil and environmental education introducing ecotourism. Critical evaluation of the currently operated eco-tours revealed that continuous and further effort is necessary for building up a si...
Spatio-temporal variability of ecological resources in tropical Africa and its agricultural use
Project Year: 2009 - 2011    Investigator(s): KOSAKI Takashi
The main factors that cause variability in agro-ecological conditions in tropical Africa were primarily the variation in parent materials of soils and climatic conditions in a larger scale, whereas in a smaller scale soil erosion as well as organi...
Identification of stress factors in soil organic matter dynamics in humid regions and its utilization in agriculture
Project Year: 2008 - 2011    Investigator(s): KOSAKI Takashi
The possibility for introducing stress-factors that could modify the soil organic matter dynamics under humid regions was tested. Two-step decomposition model including both solubilization and mineralization processes in the decomposition of polys...
Soil Organic Matter Dynamics in Boreal Ecosystems in Eurasia
Project Year: 2006 - 2007    Investigator(s): KOSAKI Takashi
Studies on Soil Organic Matter Dynamics and Their Application for Sustainable Agriculture in Humid Tropics
Project Year: 2005 - 2007    Investigator(s): KOSAKI Takashi
Soil Organic Matter Dynamics in Eurasian Steppes
Project Year: 2001 - 2003    Investigator(s): KOSAKI Takashi
Development of eco-friendly biomass production system
International Collaboration
Project Year: 1992 - 2003