DAIRAKU Koji
- Affiliation
- Institute of Systems and Information Engineering
- Official title
- Associate Professor
- URL
- );8@I8BLZieBQcKJLBL98c8:cAG
- Research fields
Hydraulic engineering - Research keywords
Regional Hydroclimate Hydrometeorology Water Cycle Regional Climate Downscaling Large Scale Simulation Environmental Disaster Prevention Water Hazard Risk Information - Research projects
Evaluation of cooling and retention effects of rice paddy fields for basin flood control in low-lying rural areas 2025-01 -- 2026-03 Dairaku, Koji Ministry of Land, Infrastructure, Transport and Tourism/River and Erosion Control Technology Development 5,940,000Yen Development of a method to evaluate the effectiveness of green infrastructure for river basin flood control 2024-04 -- 2026-03 Dairaku, Koji Kanto Regional Management Service Association/Public benefit projects 1,900,000Yen Low flow forecast for water resource management in low-lying rice fields 2024-04 -- 2025-03 Dairaku, Koji University of Tsukuba/Project for University-Industry Cooperation Strengthening in Tsukuba 1,000,000Yen Academic advising on quantification of climate change risks 2023-07 -- (current) Dairaku, Koji SOMPO RISK MANAGEMENT/Collaborative Research Academic advising on quantification of climate change risks 2020-10 -- 2023-06 Dairaku, Koji SOMPO RISK MANAGEMENT/Academic advising Towards robust projections of climate extremes and adaptation plans over South Asia 2018 -- 2020 Ali, Shaukat Asia-Pacific Network for Global Change Research/Collaborative Regional Research Programme: CRRP Development of downscaling technologies 2015-12 -- 2020-03 Dairaku, Koji Ministry of Education, Culture, Sports, Science and Technology, Japan/Social Implementation Program on. Climate Change Adaptation Technology (SI-CAT) 119,100,000Yen - Career history
2019-04 -- (current) University of TsukubaGraduate School of Systems and Information EngineeringAssociate Professor 2019-07 -- 2020-03 National Research Institute for Earth Science and Disaster ResilienceMulti-hazard Risk Assessment Research DivisionPrincipal Research Fellow (Cross Appointment) 2016-09 -- 2019-03 Malaysia-Japan International Institute of Technology (MJIIT)Master of Disaster Risk Management program (MDRM)Visiting Associate Professor 2016-04 -- 2019-03 National Research Institute for Earth Science and Disaster ResilienceIntegrated Research on Disaster Risk Reduction DivisionSenior Researcher 2011-04 -- 2016-03 National Research Institute for Earth Science and Disaster PreventionSocial System Research Department, Disaster Risk Research UnitSenior Researcher 2010-10 -- 2011-03 National Research Institute for Earth Science and Disaster PreventionDisaster Prevention Research CenterSenior Researcher 2009-06 -- 2010-05 University of Colorado at Boulder Cooperative Institute for Research in Environmental Sciences (CIRES) Research Associate (Visiting Scientist) 2009-04 -- 2010-09 National Research Institute for Earth Science and Disaster PreventionStorm, Flood, and Landslide Research DepartmentSenior Researcher 2008-07 -- 2009-03 National Research Institute for Earth Science and Disaster PreventionStorm, Flood, and Landslide Research DepartmentResearcher 2006-04 -- 2008-06 National Research Institute for Earth Science and Disaster PreventionStorm, Flood, and Landslide Research DepartmentResearcher more... - Academic background
2000-04 -- 2003-03 The University of Tokyo Graduate School of Engineering Department of Civil Engineering - Degree
1998-03 Diploma The University of Tokyo 2000-03 MSc The University of Tokyo 2003-03 Ph. D The University of Tokyo - Licenses and qualifications
2002-03 Type-1 High school teaching license for Science 2002-03 Type-1 Junior high school teaching license for Science - Academic societies
2016-10 -- (current) Japan Geoscience Union -- (current) Japan Society of Civil Engineers (JSCE) -- (current) The Japan Society of Hydrology and Water Resources -- (current) The Meteorological Society of Japan -- (current) American Geophysical Union (AGU) -- (current) Asia Oceania Geosciences Society (AOGS) -- (current) The Asia Pacific Association of Hydrology and Water Resources (APHW) - Honors & Awards
2025-05-19 JSCE International Outstanding Collaboration Award Outstanding contributions internationally to the improvement and advancement of civil engineering (Dairaku, Koji) 2025-03-25 SICE Outstanding Student Award A student with excellent character and academic performance (Llorin, Alyssa Gewell Agena) 2025-03-25 Ezaki Prize of the University of Tsukuba Alumni Association Outstanding achievements in research activities during enrollment (Llorin, Alyssa Gewell Agena) 2025-03-25 The Degree Programs in Systems and Information Engineering (SIE) Degree Programs Dean's award Local and Synoptic Influences on Long-term Trends in Rainfall over Metro Manila, Philippines (Llorin, Alyssa Gewell Agena) 2024-10-15 Scientific Forum for Numerical Simulation of Asian Regional Climate Change and Earth System Process's Best Poster Award Local and Synoptic Influences on Long-Term Trends in Rainfall over Metro Manila, Philippines (Llorin, Alyssa Gewell Agena; Dairaku, Koji) 2024-05 EMCEI-2024’s Best Paper Award Local and Synoptic Drivers for Rainfall Formation over Metro Manila, Philippines (Llorin, Alyssa Gewell Agena; Dairaku, Koji) 2024-03-25 Tsukuba Scholarship "Research Encouragement Scholarship" Analysis of feedback process on water availability in Africa from the past to future (Nguyen, Ngoc Kim Hong) 2024-03-25 Degree Program in Engineering Mechanics and Energy (EME) Degree Program Director's award Analysis of feedback process on water availability in Africa from the past to future (Nguyen, Ngoc Kim Hong) 2024-03-25 Degree Program in Engineering Mechanics and Energy (EME) Degree Program Director's award Added Values on Wind Energy Potential for South Asia Using High-Resolution Climate Models (Khan, Muhammad Abid) 2024-03-25 Degree Program in Engineering Mechanics and Energy (EME) Degree Program Director's award Impact of Climate Change, Land Use and Land Cover Change on the Hydrological Response in Upper Blue Nile Basin (Brhane, Ermias Sisay) 2023-07-09 2023 International Young Scientists Forum Best Presentation Award Uncertainty Analysis of PERSIANN-family Precipitation Products over Himalayan Mountains of Pakistan, South Asia (Nadeem, Muhammad Umar; Dairaku, Koji) 2023-03-24 Degree Program in Engineering Mechanics and Energy (EME) Degree Program Director's award Anthropogenic influence on extreme precipitation over East Asia (Adigun, Paul Ayodele) 2022-12 AGU 2022 Outstanding Student Presentation Award (OSPA) Building a high-resolution climate dataset for Vietnam based on ERA5-Land and In-situ data (Nguyen, Ngoc Kim Hong; Thanh, Ngo-Duc; Dairaku, Koji) 2022-03 Outstanding Discussion Award Outstanding discussions at the Conference on Hydraulic Engineering (Dairaku, Koji) - Articles
- Addressing Biases and Enhancing Accuracy: The Role of Downscaled Climate Models in East Africa
Endalew Negusu Tarekegn; Dairaku Koji; Nguyen Ngoc Kim H...
Euro-Mediterranean Journal for Environmental Integration, 2025-06 - Sensitivity of WRF Parameterization Combinations in Simulating Precipitation Over the Upper Blue Nile Basin
Endalew Negusu Tarekegn; Dairaku Koji
Euro-Mediterranean Journal for Environmental Integration, 2025-06 - Copula-based Multivariate Drought Index for Monitoring Drought in the Upper Blue Nile Basin, Ethiopia
Defersha Dessalew Tadesse; Dairaku Koji; Nguyen Ngoc K...
Euro-Mediterranean Journal for Environmental Integration, 2025-06 - Extreme Precipitation Assessment in the Southeast Greater Mekong Subregion: Insights from Statistical Downscaling
Nguyen Ngoc Kim Hong; Dairaku Koji
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Refining Regional Climate: High-Resolution Statistical Downscaling with Relative Humidity and Temperature over Southeast of the Greater Mekong Subregion
Nguyen Ngoc Kim Hong; Dairaku Koji
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Machine Learning-Based Downscaling of High-Resolution GCMs for Accurate Precipitation Tracking in Flood-Prone Regions of Pakistan
Nadeem Muhammad Umar; Dairaku Koji; Adigun Paul Ayodele
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Assessing Hydrological Uncertainty in the Upper Blue Nile Basin: A Multi-Model Evaluation
Endalew Negusu Tarekegn; Dairaku Koji; Adigun Paul Ayode...
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Evaluation of the Influence of Climate Change on Solar Power Potential in Japan
Shobayashi Narin; Dairaku Koji; Adigun Paul Ayodele
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Dynamic-Thermodynamic Coupled Systems Metrics for Improving Tropical Cyclone Intensity Estimation in CMIP6 Models
Adigun Paul Ayodele; Dairaku Koji
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Assessing the Impact of Projected Climate Change on Sediment Yield Using CMIP6 Ensemble Models
Doko Hailemariam Mengistu; Dairaku Koji; Defersha Dess...
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Groundwater Level Fluctuations and Dynamics in the Semi-Arid Region of Northeastern Ethiopia
Doko Hailemariam Mengistu; Dairaku Koji; Defersha Dess...
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Assessing the Hydrological Impacts of Future Land Use Change Scenarios in the Upper Blue Nile Basin Using an Integrated FLUS-SWAT Modeling Approach
Brhane Ermias Sisay; Dairaku Koji; Adigun Paul Ayodele
Earth Systems and Environment (ESEV-2025) Proceedings, 2025-4 - Assessing wind power generation potential over South Asia using wind speed observation and reanalysis datasets
Khan Muhammad Abid; DAIRAKU Koji; Kelkar Saurabh
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT/39/pp.1179-1207, 2025-02 - Spatiotemporal analysis of drought patterns and trends across Africa: a multi-scale SPEI approach (1960-2018)
Ogunrinde Akinwale T.; Adigun Paul; Xue Xian; Dairaku ...
INTERNATIONAL JOURNAL OF DIGITAL EARTH/18(1), 2025-1-06 - The future of photovoltaic energy potential in Africa under higher emission scenarios: Insights from CMIP6 multi-model ensemble analysis
Adigun Paul; Ogunrinde Akinwale T.; Dairaku Koji; Adeb...
SOLAR ENERGY/285, 2025-01-01 - Study for the creation of stochastic Japanese Tropical Cyclone (TC) events and economic loss assessment in future climate
Arai Takayoshi; Tsurushima Daiki; Dairaku Koji; Shimokawa...
Advances in Science, Technology & Innovation (ASTI), 2024-11 - Research on the water retention and cooling effects of urban greening for climate change adaptation
Aoki Fumiya; Dairaku Koji
Advances in Science, Technology & Innovation (ASTI), 2024-11 - Development and Evaluation of a Novel Precipitation Product for Extreme Events: A Principal Component Analysis Approach
Nadeem Muhammad Umar; Dairaku Koji; Nguyen Ngoc Kim Hong...
Advances in Science, Technology & Innovation (ASTI), 2024-11 - Investigating the Impact of Climate Change on the Hydrology of Gumara Maksegnit Watershed, Lake Tana Basin, Ethiopia
Defersha Dessalew Tadesse; Dairaku Koji; Doko Hailemar...
Advances in Science, Technology & Innovation (ASTI), 2024-11 - Significance of upper troposphere cooling in modulating tropical cyclone potential intensity in the recent decade
Adigun Paul Ayodele; Dairaku Koji
Advances in Science, Technology & Innovation (ASTI), 2024-11 - Anthropogenic influence on changing extreme precipitation patterns over East Asia
Adigun Paul Ayodele; Dairaku Koji
Advances in Science, Technology & Innovation (ASTI), 2024-11 - Multi-scale drought variability over West Africa and the associated large-scale circulation patterns
Ogunrinde Akinwale T.; Adigun Paul; Xian Xue; Yu Haip...
GEOMATICS NATURAL HAZARDS & RISK/15(1), 2024-10-11 - Evaluation of Wind Speed Accuracy Enhancement in South Asia Through Terrain-Modified Wind Speed (Wt) Adjustments of High-Resolution Regional Climate Modeling
Khan Muhammad Abid; DAIRAKU Koji; Kelkar Saurabh
EARTH SYSTEMS AND ENVIRONMENT/Epub, 2024-08 - Unraveling Soil Moisture Response and Water Availability over Africa in the past and projection scenarios
Nguyen Ngoc Kim Hong; Dairaku Koji
Euro-Mediterranean Journal for Environmental Integration, 2024-05 - Random forest classification for land use land cover mapping the case of Awash Basin
Doko Hailemariam Mengistu; Dairaku Koji
Euro-Mediterranean Journal for Environmental Integration, 2024-05 - more...
- Addressing Biases and Enhancing Accuracy: The Role of Downscaled Climate Models in East Africa
- Conference, etc.
- Heat Stress Analysis by Statistical Downscaling Over Vietnam and Cambodia Regions Towards Local Climate Risk Assessment
Nguyen Ngoc Kim Hong; Dairaku Koji
22th Annual Meeting of the Asia Oceania Geosciences Society (AOGS 2025)/2025-07-31 - Hybrid Statistical Downscaling and Moist Heatwave Analysis over Southeast Greater Mekong
Nguyen Ngoc Kim Hong; Dairaku Koji
22th Annual Meeting of the Asia Oceania Geosciences Society (AOGS 2025)/2025-07-30 - Investigating The Urban Rainfall Effect Of Metro Manila, Philippines Under Varying Synoptic Conditions Using The WRF Model
Llorin Alyssa Gewell Agena; Dairaku Koji
22th Annual Meeting of the Asia Oceania Geosciences Society (AOGS 2025)/2025-07-29 - Evaluating Urban Greening's Effects on Water Retention and Cooling in East Asia for Climate Change Adaptation
Aoki Fumiya; Dairaku Koji; Wang Yingfu; Brhane Ermias...
22th Annual Meeting of the Asia Oceania Geosciences Society (AOGS 2025)/2025-07-29 - Copula-based Multivariate Drought Index for Monitoring Drought in the Upper Blue Nile Basin, Ethiopia
Defersha Dessalew Tadesse; Dairaku Koji; Nguyen Ngoc K...
7th Euro-Mediterranean Conference for Environmental Integration (EMCEI-2025)/2025-06-24 - Addressing Biases and Enhancing Accuracy: The Role of Downscaled Climate Models in East Africa
Endalew Negusu Tarekeg; Dairaku Koji; Nguyen Ngoc Kim Ho...
7th Euro-Mediterranean Conference for Environmental Integration (EMCEI-2025)/2025-06-23 - Sensitivity of WRF Parameterization Combinations in Simulating Precipitation Over the Upper Blue Nile Basin
Endalew Negusu Tarekeg; Dairaku Koji
7th Euro-Mediterranean Conference for Environmental Integration (EMCEI-2025)/2025-06-23 - Evaluation of the Influence of Climate Change on Solar Power Potential in Japan
正林 奈倫; 大楽 浩司
Japan Geoscience Union Meeting 2025/2025-05-28 - Investigation of Key Role in Hotspot Occurrence using Multivariate Principal Component and Distribution Analysis (Study case: Kalimantan and South Sumatra, Indonesia)
Septiawan Pandu; Dairaku Koji
Japan Geoscience Union Meeting 2025/2025-05-27 - Evaluating Urban Greening’s effects on Water Retention and Cooling in East Asia for Climate Change Adaptation
青木 文弥; 大楽 浩司
Japan Geoscience Union Meeting 2025/2025-05-26 - Rainfall Erosivity in a Changing Climate: Historical Trends and Future Projections from CMIP6
Doko Hailemariam Mengistu; Dairaku Koji; Brhane Ermias...
Japan Geoscience Union Meeting 2025/2025-05-26 - Assessing Hydrological Uncertainty in the Lake Tana Sub-Basin of the Blue Nile, Ethiopia Using CMIP5, CMIP6, and CORDEX Models
Endalew Negusu Tarekegn; Dairaku Koji; Adigun Paul Ayo...
Japan Geoscience Union Meeting 2025/2025-05-26 - Parametric Multivariate Index for Monitoring Drought in the upper Blue Nile River basin, Ethiopia
Defersha Dessalew Tadesse; Dairaku Koji; Nguyen Ngoc K...
Japan Geoscience Union Meeting 2025/2025-05-26 - Hydrological Response to Climate Change-Induced Extreme Rainfall in Pakistan
Nadeem Muhammad Umar; Dairaku Koji
Japan Geoscience Union Meeting 2025/2025-05-26 - Statistical Downscaling of CMIP6 GCMs for the Southeast Greater Mekong Subregion Towards Strengthening Local Climate Impact Assessments
Nguyen Ngoc Kim Hong; Dairaku Koji
Japan Geoscience Union Meeting 2025/2025-05-26 - Extreme Precipitation Assessment in the Southeast Greater Mekong Subregion: Insights from Statistical Downscaling
Nguyen Ngoc Kim Hong; Dairaku Koji
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-29 - Evaluation of the Influence of Climate Change on Solar Power Potential in Japan
Shobayashi Narin; Dairaku Koji; Adigun Paul Ayodele
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-29 - Dynamic-Thermodynamic Coupled Systems Metrics for Improving Tropical Cyclone Intensity Estimation in CMIP6 Models
Adigun Paul Ayodele; Dairaku Koji
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-29 - Assessing Hydrological Uncertainty in the Upper Blue Nile Basin: A Multi-Model Evaluation
Endalew Negusu Tarekegn; Dairaku Koji; Adigun Paul Ayode...
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-29 - Assessing the Impact of Projected Climate Change on Sediment Yield Using CMIP6 Ensemble Models.
Doko Hailemariam Mengistu; Dairaku Koji; Defersha Dess...
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-29 - Groundwater Level Fluctuations and Dynamics in the Semi-Arid Region of Northeastern Ethiopia
Doko Hailemariam Mengistu; Dairaku Koji; Defersha Dess...
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-29 - Refining Regional Climate: High-Resolution Statistical Downscaling with Relative Humidity and Temperature over Southeast of the Greater Mekong Subregion
Nguyen Ngoc Kim Hong; Dairaku Koji
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-28 - Machine Learning-Based Downscaling of High-Resolution GCMs for Accurate Precipitation Tracking in Flood-Prone Regions of Pakistan
Nadeem Muhammad Umar; Dairaku Koji; Adigun Paul Ayodele
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-28 - Assessing the Hydrological Impacts of Future Land Use Change Scenarios in the Upper Blue Nile Basin Using an Integrated FLUS-SWAT Modeling Approach
Brhane Ermias Sisay; Dairaku Koji; Adigun Paul Ayodele
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-28 - Analysis of Compound Dry-Hot-Windy Condition Impact to Forest Fire in Southeast Asia and Australia
Septiawan Pandu; Dairaku Koji; Nurdiati Sri; Sopaheluw...
1st Earth Systems and Environment Journal Annual Meeting (ESEV-2025)/2025-04-28 - more...
- Heat Stress Analysis by Statistical Downscaling Over Vietnam and Cambodia Regions Towards Local Climate Risk Assessment
- Teaching
2024-10 -- 2025-02 Research in Engineering Mechanics and Energy B University of Tsukuba. 2024-10 -- 2025-02 Research in Engineering Mechanics and Energy Ib University of Tsukuba. 2024-10 -- 2025-02 Seminar in Engineering Mechanics and Energy Ib University of Tsukuba. 2024-10 -- 2025-02 Research in Engineering Mechanics and Energy IIb University of Tsukuba. 2024-10 -- 2025-02 Seminar in Engineering Mechanics and Energy IIb University of Tsukuba. 2024-10 -- 2025-02 Seminar in Engineering Mechanics and Energy B University of Tsukuba. 2024-04 -- 2024-08 Seminar in Engineering Mechanics and Energy II University of Tsukuba. 2024-10 -- 2025-02 Seminar in Engineering Mechanics and Energy II University of Tsukuba. 2024-04 -- 2024-08 Seminar in Engineering Mechanics and Energy A University of Tsukuba. 2024-04 -- 2024-08 Seminar in Engineering Mechanics and Energy Ia University of Tsukuba. more... - Other educational activities
2019-10 -- 2019-10 Special Lecture University of Tsukuba - Professional activities
-- 2024-12 Science Council of Japan 環境学委員会・地球惑星科学委員会合同 FE・WCRP合同分科会GEWEX小委員会委員 2014-10 -- 2016-10 The Japan Society of Hydrology and Water Resources Executive Secretary, Editorial and Publication Committee 2016-10 -- 2024-12 The Japan Society of Hydrology and Water Resources Secretary, Tsukuba Group, Editorial and Publication Committee 2016-11 -- (current) Coordinated Regional climate Downscaling Experiment (CORDEX) Asia Point of Contact (POC) - University Management
2019-04 -- 2021-03 Internship Committee Member, College of Engineering Systems & Degree Program in Engineering Mechanics and Energy (EME) Internship Committee Member 2019-04 -- 2021-03 Admissions Committee, Degree Program in Engineering Mechanics and Energy (EME) Admissions Committee Member 2019-04 -- 2023-03 College of Engineering Systems Class Advisor
(Last updated: 2025-09-12)