|
Title |
Professor |
|
Laboratory Address |
1-1-1 Sakuragaoka Setagaya-ku, Tokyo 156-8502, Japan |
|
Laboratory Phone number |
+81-35477-2338 |
|
Laboratory Fax number |
+81-35477-2620 |
|
Contact information |
|
|
Homepage |
https://www.nodai.ac.jp/english/undergraduate/reg/eng/lab/laboratory-land-and-water-use-engineering/ |
|
Profile |
In 1992, the United Nations Conference on Environment and Development was held in Rio de Janeiro, Brazil, where discussions on “sustainable development” and “sustainability” were promoted. Subsequently, the Decade of Education for Sustainable Development, resolved at the UN General Assembly in 2002, was promoted from 2005 to 2014, leading to the SDGs, which began in 2015. In order to promote sustainable development in the least developed countries of Asia and Africa, it is important not to transfer technologies from developed countries, but to consider local adaptability and acceptability. The major issue is not only the diffusion of environmental conservation technologies, but also how to improve the income of local residents and community development to create “sustainable development” with the participation of local residents. |
|
External Link |
|
|
|
MIHARA Machito Professor |
From Graduate School 【 display / non-display 】
-
Tokyo University of Agriculture and Technology Graduate School, Division of Agricltural Sciences Doctoral program (second term) Completed
1990.04 - 1993.03
Country：Japan
-
Ibaraki University Graduate School, Division of Agriculture Master Course Completed
1988.04 - 1990.03
Country：Japan
Studying abroad experiences 【 display / non-display 】
-
1995.08 - 1995.09 The University of Arizona, USA Visiting Researcher
Degree 【 display / non-display 】
-
Doctor of Agriculture ( 1993.03 Tokyo University of Agriculture and Technology )
Employment Record in Research 【 display / non-display 】
-
Tokyo University of Agriculture - Department of Agricultural Engineering, Faculty of Agriculture Research Associate
1993.04 - 1995.03
Country：Japan
-
Tokyo University of Agriculture - Department of Agricultural Engineering, Faculty of Agriculture Assistant Professor
1995.04 - 1998.03
Country：Japan
-
Tokyo University of Agriculture Faculty of Regional Environment Science Department of Bioproduction and Environment Engineering Department of Bioproduction and Environment Engineering, Faculty of Regional Environment Science Assistant Professor
1998.04 - 1998.09
Country：Japan
-
Tokyo University of Agriculture Institute for Regional Environment Research
1998.04 - 2000.03
Country：Japan
-
Tokyo University of Agriculture Department of Agricultural Engineering, Graduate School of Agriculture Lecturer
1998.04 - 2005.03
Country：Japan
External Career 【 display / non-display 】
-
Visiting Professor at Royal University of Agriculture, Cambodia Guest professor
2009.10 - 2017.07
Country：Cambodia
-
Visiting Professor at Khon Kaen University, Thailand Faculty of Agriculture Guest professor
2008.04 - 2009.03
Country：Thailand
Professional Memberships 【 display / non-display 】
-
Editorial Committee of International Journal of Environmental and Rural Development
2010.01
-
International Society of Environmental and Rural Development
2010.01
-
Committee Member, ICERD, International Conference on Environmental and Rural Development
2009.10
Research Areas 【 display / non-display 】
-
Environmental Science/Agriculture Science / Rural environmental engineering and planning
-
Environmental Science/Agriculture Science / Environmental dynamics
Papers 【 display / non-display 】
-
Structure and Financial Characteristics of ERECON: Extension and Research Integration
UENO TAKASHI, MIHARA MACHITO, KAWABE KUMIKO, YAMAJI EIJI, AOKI KEIKO
International Journal of Environmental and Rural Development 16 ( 1 ) 192 - 197 2025
Language：English Publisher：Institute of Environmental Rehabilitation and Conservation, Research Center
<p>The Institute of Environmental Rehabilitation and Conservation’s (ERECON) financial structure highlights its unique position among Japanese NGOs. Since its establishment in 2000 and its transition to a Non-Profit Organization in 2002, ERECON has primarily relied upon grants and donations, with annual revenue exceeding 100 million Japanese Yen (JPY) in both 2018 and 2023. The Japan NGO Center for International Cooperation reports that ERECON operates with 100 - 300 million JPY annually as do 15.9% of the total Japanese international cooperation NGOs. A distinctive characteristic of ERECON is its ability to develop extension programs based on the research outcomes, as seeds for extension, which is rare among NGOs. Since ERECON’s 2013 designation as a MEXT-accredited research institution, ERECON began various Grants-in-Aid for Scientific Research, contributing to extension programs as well as financial diversification. Further unlike most NGOs that depend solely on external activity with its funding, ERECON successfully integrates research outcomes and its outreach, extension program, ensuring financial stability while maintaining its mission related to environmental rehabilitation and rural development. Despite challenges such as limited financial and human resources, ERECON’s financial structure and strategy-balancing traditional NGO funding with research grants-sets it apart in the sector. ERECON’s ability to sustain and expand its financial resources is critical in reinforcing its role as a leading model for Japanese NGOs integrating research outcomes and extension programs for practical development purposes.</p>
-
Relationships between Soil Characteristics and Brewing Grape Quality in Katsunuma, Yamanashi Prefecture, Japan
KURIHARA AI, MIHARA MACHITO
International Journal of Environmental and Rural Development 16 ( 1 ) 106 - 110 2025
Language：English Publisher：Institute of Environmental Rehabilitation and Conservation, Research Center
<p>In this study, the qualities of Chardonnay grapes from Katsunuma, Yamanashi Prefecture used for making wine, in, and the physical and chemical properties of the soils around the target fruit trees were analyzed to define the relationships between the grapes and soil properties. The survey covered three garden sites from one winery in Katsunuma Town. Undisturbed soil and disturbed soils were sampled from a depth of 20 cm, 30 cm below the trunk of the vines, and were used to measure physical and chemical properties, respectively. The physical properties measured were three-phase distribution, soil particle size composition, and hydraulic conductivity. Chemical properties measured were pH, EC, K<sub>2</sub>O, Na<sub>2</sub>O, CaO, and NO<sub>3</sub>-N. Grapes were collected at harvest time, de-stemmed and pressed, and then analyzed for sugar content, glucose, fructose, acidity, malic acid, and tartaric acid. Software R was used for statistical analysis. The experimental results indicate that differences in soil particle size composition and soil properties may affect the sugar and acid levels of the grapes. In addition, soil pH, permeability, and CaO were found to be important factors to be considered in wine making. Soil pH has a strong correlation with glucose, grape pH, and sugar content, and may serve as an indicator when evaluating soil pH in the future. In summary, it was clear that soil physical and chemical properties affect fruit quality.</p>
-
OUM SOMARA, TOUCH NARONG, MIHARA MACHITO
International Journal of Environmental and Rural Development 16 ( 1 ) 144 - 151 2025
Language：English Publisher：Institute of Environmental Rehabilitation and Conservation, Research Center
<p>The main goal of this research study was to evaluate the calcium-silicate-hydrate (CSH) synthesized from calcium hydroxide (Ca(OH)<sub>2</sub>) and rice husk charcoal and to determine if the CSH is economically and environmentally friendly and can be used as a promising strategy for nitrogen and phosphorus recovery. The CSH material was prepared by combining Ca(OH)<sub>2</sub> and rice husk charcoal in a 1:4 ratio and mixing the sample with 75% deionized water. Following mixing, a vibrator was used for 1 minute for Case 1, 2 minute for Case 2 and 3 minute for Case 3. The CSH was then put into molds which were maintained at room temperature for 3 weeks before starting the experiments. The two weeks adsorption experiment investigated parameters such as pH, EC, Ca, K, NH <sub>4</sub><sup>+</sup>, and PO <sub>4</sub><sup>3-</sup> in 2 weeks. The 1<sup>st</sup> and 2<sup>nd</sup> elusion experiments were carried out on used CSH to test the dissolution rate of NH <sub>4</sub><sup>+</sup> and PO <sub>4</sub><sup>3-</sup>. To confirm the used CSH effectiveness as a fertilizer, a plant growth experiment was also carried out to measure the growth rate of spinach and the improvement of soil fertility. The results of the adsorption experiment indicated that CSH can effectively remove nutrients from wastewater, achieving removal rates of 97% for NH <sub>4</sub><sup>+</sup> and 98% for PO <sub>4</sub><sup>3-</sup>. The adsorption capacity of CSH is 0.065 mg- NH <sub>4</sub><sup>+</sup>/g-CSH and 0.11 mg-PO <sub>4</sub><sup>3-</sup>/ g-CSH. Additionally, the used CSH can release 3-5 mg/kg for NH <sub>4</sub><sup>+</sup> and 6.6-7.7 mg/kg of PO <sub>4</sub><sup>3-</sup> in the elusion experiments. Moreover, the plant growth experiment also indicates that the soil fertility increased 3 times with the 5% addition of used CSH treatment, compared to the control treatment. These results suggest that CSH, made from Ca(OH)<sub>2</sub> and rice husk charcoal, could serve as a cost-effective solution to wastewater treatment and production of fertilizer for agricultural production.</p>
-
Field-Based Insights into the Challenges of Sustainable Forest Management in Cambodia
AOKI KEIKO, AHMATH MOSTAFA, VA SREYLEN, MIHARA MACHITO
International Journal of Environmental and Rural Development 16 ( 2 ) 198 - 203 2025
Language：English Publisher：Institute of Environmental Rehabilitation and Conservation, Research Center
<p>In Cambodia, forest cover decreased from 73% in the 1960s to 41% in 2020. The causes of deforestation and forest degradation include forest clearing and agricultural expansion, large-scale illegal logging, and timber trade following the issuance of Economic Land Concessions (ELCs). The impact of deforestation continues due to the overexploitation of forest resources by the growing population and unofficial ELCs. The massive forest loss in Cambodia has increased the risk of natural disasters, decreased the biological and genetic diversity of indigenous trees, and jeopardized local livelihoods where residents have traditionally relied on forest resources. Therefore, the Institute of Environmental Rehabilitation and Conservation (ERECON) has been addressing the challenges of forest loss with the aim of sustainable community development across Cambodian provinces. Initiatives are formed by integrating all three organizational programs, including: 1. Environmental Rehabilitation and Conservation - We recommend promoting participatory reforestation and management activities, enhancing carbon sequestration through agroforestry, conserving biodiversity through mixed planting of native tree species, and promoting genetic diversity through the propagation of seedlings. 2. Utilization of Natural Resources: Enhancing natural resource circulation through agroforestry, compost making using locally available organic resources, and promoting sustainable forest resource utilization. 3. Environmental Education: Promoting capacity building of local communities through workshops, training sessions, and participatory rural appraisal methods; formulating management groups that play a central role in managing planted seedlings; strengthening the capacity of schoolteachers; and promoting environmental education in elementary schools. In the program year of 2024, the project on promoting school environment greening, aiming for forest environmental education in Tboung Khmum Province, as well as the project on promoting reforestation and education for sustainable development in Siem Reap Province, were implemented. Based on the cases implemented in both provinces, the achievements and challenges of sustainable forest management in Cambodia are discussed.</p>
-
Local Awareness and Perception of Fertilizers: A Case Study in Anuradhapura District, Sri Lanka
PRIYADARSHANI BANDARA ARACHCHILLAGE BUDDHIKA, MIHARA MACHITO
International Journal of Environmental and Rural Development 16 ( 1 ) 57 - 64 2025
Language：English Publisher：Institute of Environmental Rehabilitation and Conservation, Research Center
<p>For many decades, the agriculture sector in Sri Lanka has been dependent on chemical fertilizers, providing near-term benefits but posing substantial long-term environmental impacts. This practice underscores the challenge of transitioning to more sustainable farming strategies. Through structured questionnaires and in-depth discussions, we explored the awareness and perception of fertilizer application practices among paddy farmers in the Tisa Wewa irrigation scheme in the dry zone of Sri Lanka. Most farmers (78%) relied solely on inorganic fertilizers, while an approach of mixed inorganic and organic fertilizers was adopted by 19%. Only 3% of farmers used solely organic fertilizer. Of the respondents utilizing inorganic fertilizer, 44.1% applied the recommended amount set by the Department of Agriculture, Sri Lanka, while 42.6% applied greater than the recommended amount, and 13.2% applied less than the recommended amount. The survey and interview data indicated that the current practice and high reliance on inorganic fertilizer is due to the limitations of organic fertilizers governed by the large amount needed, the longer necessary to release nutrients, and the limited manure availability. Most farmers (87.1%) expressed a strong preference for adopting mixed organic and inorganic fertilizer applications in the future, emphasizing the use of high-quality input products, reflecting a forward-looking approach to sustainable agriculture, combining the benefits of both organic and inorganic fertilizers. The statistical results strongly indicate that education and awareness reduce the over-dependency on inorganic fertilizers and significantly influence the adoption of sustainable fertilizer practices.</p>
Books and Other Publications 【 display / non-display 】
-
Restoring Satoyama Landscapes in Cambodia
三原真智人 他11名（ Role： Joint author , 担当部分の執筆と監修）
Institute of Environment Rehabilitation and Conservation 2013.09 （ ISBN:978-4-916174-13-0 ）
Language：English Book type：Scholarly book
Restoring Satoyama Landscapes in Cambodiaはカンボジアにおける自然資源の保全及び利活用に向けた様々な活動や取り組みについて論議したものである。
A5版 全頁数：pp.44 -
Toward More Sustainable Consumption and Production Systems and Sustainable Livelihoods
Machito MIHARA, et al.（ Role： Joint author , RCE Greater Phnom Penh, pp.78-85）
United Nations University 2011.04
Language：English Book type：Scholarly book
国連大学高等研究所がESDを推進する中で、世界各地のRCEの取り組みについて取り上げたものである。
B5版 全頁数：pp. 130 -
Guidebook on International Environment Cooperation
Machito MIHARA. et al.（ Role： Joint author）
Institute of Environment Rehabilitation and Conservation 2010.11 （ ISBN:978-4-916174-10-9 ）
Language：Japanese Book type：Textbook, survey, introduction
-
沙漠の事典
三原真智人他118名（ Role： Joint author , p.62）
日本沙漠学会 2009.07
Language：Japanese
日本沙漠学会が編集に当たった「沙漠の事典」中、「農業支援と住民参加」について執筆した。
-
Sustainable Farming Practices for Environmental Conservation
三原真智人・藤本彰三編著 他17名著（ Role： Joint author , pp.1-41）
Institute of Environment Rehabilitation and Conservation (ERECON) 2009.02 （ ISBN:4-916174-08-9 ）
Language：English
環境保全に向けた持続的農法について取り上げ、堆肥づくりや生物起源防虫液づくりなどの具体的な10項目の農法を解説した。
A5版 全頁数：pp.41
Misc 【 display / non-display 】
-
Report of the Regional Workshop on Rehabilitation of Agriculture in Tsunami Affected Areas -One and Half Years Later-
三原真智人 他61名著
RAP PUBLICATION 2006/17, FAO Regional Office for Asia and the Pacific, United Nations 2006.06
Authorship：Lead author Language：English Publishing type：Article, review, commentary, editorial, etc. (other)
津波発生から一年半後の農業修復に関する状況と今後の指針について扱ったものである。（英文）
A4版 全頁数：pp.119 -
Report of the Regional Workshop on Salt-Affected Soils from Sea Water Intrusion -Strategies for Rehabilitation and Management-
三原真智人 他43名著
RAP PUBLICATION 2005/11, FAO Regional Office for Asia and the Pacific, United Nations 2005.04
Authorship：Lead author Language：English Publishing type：Article, review, commentary, editorial, etc. (other)
スマトラ沖地震に伴い発生した津波により被害を受けた農地の塩害対策について扱ったものである。（英文）
A4版 全頁数：pp.57 -
Organic Fertilizer Application for Sustainable Agriculture （有機肥料と持続的農業）
三原真智人、サンアルン ジャンヤ、インタノン プミサック、陳嫣、山本尚行
環境修復保全機構 2003.06
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
タイ国の現地農家を対象とした有機肥料と持続的農業に関する啓蒙活動を推進するために編集されたガイドブックである。タイ語、英語、日本語の3カ国語で記載されている。
-
傾斜地の森林伐採による土壌および栄養塩類の動態変動
三原真智人、陳嫣
応用水文 農業土木学会 水文・水環境研究部会 13 1 - 10 2000.11
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
傾斜地の森林伐採による土壌および栄養塩類の動態変動について論議した。
-
平成10年度研究部会報告 土壌物理研究部会(第37回)
三原真智人、上野貴司、安富六郎
農業土木学会誌 66 ( 6 ) 53 - 57 1999.06
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
平成10年度農業土木学会土壌物理研究部会での論議をまとめたものである。研究部会では、畑地における土壌流亡と富栄養化成分の流出問題と、台風時における窒素およびリン成分の流出特性の2課題について報告している。
Honours, Awards and Prizes 【 display / non-display 】
-
Royal Order of Sahametrei
2026.03 Royal Government of Cambodia
-
Award of Outstanding Scientific Achievement
2022.03 International Society of Environmental and Rural Development
Award type：International academic award (Japan or overseas)
-
Medal Sahak Metrey from Royal Government of Cambodia
2012.03
Machito MIHARA
Country：Cambodia
-
生態工学会論文賞
2011.06 生態工学会
三原真智人
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
-
Award of Excellent Paper
2010.01
Aqil Muhammad, Machito MIHARA
Award type：Award from international society, conference, symposium, etc. Country：Cambodia
Presentations 【 display / non-display 】
-
Palm Shell Filter Strips as Conservation Strategy in Mitigating Soil and Nutrient Losses under Simulated Tropical Rainfall Pattern International conference
Thayalan GOPAL、三原真智人、高橋悟、豊田裕道
Abstracts of the International Agricultural Engineering Conference, AAAE p.25 2007.12
Event date： 2007.12
Language：English Presentation type：Oral presentation (general)
熱帯降雨条件下で発生する土壌および肥料成分の流出抑制を目指したパーム椰子殻緩衝帯を保全効果を評価したものである。
-
Farmers' Acceptability on Technology Transfer for Sustainable Agriculture in Uttaradit of Northern Thailand International conference
Lalita SIRIWATTANANON、三原真智人
Abstracts of the International Agricultural Engineering Conference, AAAE p.25 2007.12
Event date： 2007.12
Language：English Presentation type：Oral presentation (general)
タイ国北部ウッタラディットにおける持続的農業の確立に向けた技術移転に対する現地農家の受入度について論議したものである。
-
Effects of Width in Grass Buffer Strips on Trapping Characteristics of Soil and Nutrient Components International conference
河村征、川井聡之、三原真智人
Abstracts of the International Agricultural Engineering Conference, AAAE p.24 2007.12
Event date： 2007.12
Language：English Presentation type：Oral presentation (general)
植生幅が土壌および肥料成分の捕捉特性に与える影響を論議したものである。
-
Rehabilitating Salt Affected Soils with Chemical Geo-Textile for Sustainable Agriculture in Northeast Thailand International conference
荘司康太、三原真智人
Abstracts of the International Agricultural Engineering Conference, AAAE p.86 2007.12
Event date： 2007.12
Language：English Presentation type：Oral presentation (general)
タイ国東北部の塩類集積地を対象として、ジオテキスタイルを適用した土壌の修復技術について評価を行った。
-
Effects of Surface Water Depth in Grass Buffer Strips on Trapping Soil and Nutrient Components International conference
川井聡之、山本尚之、三原真智人
Abstracts of the International Agricultural Engineering Conference, AAAE p.24 2007.12
Event date： 2007.12
Language：English Presentation type：Oral presentation (general)
植生帯に流入する表面流去水の水深が土壌および肥料成分の捕捉特性に与える影響について論議したものである。
Committee Memberships 【 display / non-display 】
-
Institute of Environmental Rehabilitation and Conservation President, Director of Administrative Center, ERECON
2015.04
-
Editorial Committee of International Journal of Environmental and Rural Development Editor in Chief, IJERD
2014.04 - 2026.03
Social Activities 【 display / non-display 】
-
International Sustainable Development Programs, ERECON Institute
Role(s)： Consultant, Official expert, Planner, Logistic support, Investigater
Institute of Environmental Rehabilitation and Conservation 2012.04
Basic stance of industry-university cooperation 【 display / non-display 】
-
Any proposals are welcome, in case there are some potential to contribute to sustainable development from a viewpoint of international environment cooperation.
Attractiveness of Research 【 display / non-display 】
-
My research covers environmental rehabilitation and conservation, especially related to natural resources such as soil, water, vegetation and microorganism. In addition, study on international environment is a current issue in my research field.