DAIRAKU Koji

Affiliation
Institute of Systems and Information Engineering
Official title
Associate Professor
ORCID
0009-0006-4924-9618
URL
Email
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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
AI-Based Probabilistic Forecasting of Flood Peaks and Irrigation Readiness: Enhancing Rice Paddy Storage and Solar Pump Reliability in River Basins of India and Japan2026-03 -- 2027-02Dairaku, KojiJapan Science and Technology Agency (JST)/LOTUS Programme3,734,059Yen
Deep Learning-Based Assessment of Renewable Energy Potential with International Collaboration2026-02 -- 2029-02Dairaku, KojiIchimura Foundation for New Technology/Ichimura Environmental Research Grant6,500,000Yen
Evaluation of cooling and retention effects of rice paddy fields for basin flood control in low-lying rural areas2025-01 -- 2026-03Dairaku, KojiMinistry of Land, Infrastructure, Transport and Tourism/River and Erosion Control Technology Development5,940,000Yen
Development of a method to evaluate the effectiveness of green infrastructure for river basin flood control2024-04 -- 2026-03Dairaku, KojiKanto Regional Management Service Association/Public benefit projects1,900,000Yen
Low flow forecast for water resource management in low-lying rice fields2024-04 -- 2025-03Dairaku, KojiUniversity of Tsukuba/Project for University-Industry Cooperation Strengthening in Tsukuba1,000,000Yen
Academic advising on quantification of climate change risks2023-07 -- (current)Dairaku, KojiSOMPO RISK MANAGEMENT/Collaborative Research
Academic advising on quantification of climate change risks2020-10 -- 2023-06Dairaku, KojiSOMPO RISK MANAGEMENT/Academic advising
Towards robust projections of climate extremes and adaptation plans over South Asia2018 -- 2020Ali, ShaukatAsia-Pacific Network for Global Change Research/Collaborative Regional Research Programme: CRRP
Development of downscaling technologies2015-12 -- 2020-03Dairaku, KojiMinistry 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 -- 2020-03National Research Institute for Earth Science and Disaster ResilienceMulti-hazard Risk Assessment Research DivisionPrincipal Research Fellow (Cross Appointment)
2016-09 -- 2019-03Malaysia-Japan International Institute of Technology (MJIIT)Master of Disaster Risk Management program (MDRM)Visiting Associate Professor
2016-04 -- 2019-03National Research Institute for Earth Science and Disaster ResilienceIntegrated Research on Disaster Risk Reduction DivisionSenior Researcher
2011-04 -- 2016-03National Research Institute for Earth Science and Disaster PreventionSocial System Research Department, Disaster Risk Research UnitSenior Researcher
2010-10 -- 2011-03National Research Institute for Earth Science and Disaster PreventionDisaster Prevention Research CenterSenior Researcher
2009-06 -- 2010-05University of Colorado at Boulder　Cooperative Institute for Research in Environmental Sciences (CIRES)　Research Associate (Visiting Scientist)
2009-04 -- 2010-09National Research Institute for Earth Science and Disaster PreventionStorm, Flood, and Landslide Research DepartmentSenior Researcher
2008-07 -- 2009-03National Research Institute for Earth Science and Disaster PreventionStorm, Flood, and Landslide Research DepartmentResearcher
2006-04 -- 2008-06National Research Institute for Earth Science and Disaster PreventionStorm, Flood, and Landslide Research DepartmentResearcher
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Academic background
2000-04 -- 2003-03The University of Tokyo Graduate School of Engineering Department of Civil Engineering
Degree
1998-03DiplomaThe University of Tokyo
2000-03MScThe University of Tokyo
2003-03Ph. DThe University of Tokyo
Licenses and qualifications
2002-03Type-1 High school teaching license for Science
2002-03Type-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
2026-03-25Meikei-kai Award (Meikei Alumni Association)Outstanding achievements in activities during enrollment (Nadeem, Muhammad Umar)
2026-03-25Best Student Award (Degree Program in Engineering Mechanics and Energy, University of Tsukuba)Advancing Extreme Precipitation Modeling Using Data Fusion and Machine Learning (Nadeem, Muhammad Umar)
2026-03-25Best Student Award (Degree Program in Engineering Mechanics and Energy, University of Tsukuba)Soil Loss Response to Climate and Land Use/Land Cover Changes under Projected Scenario: A Case Study of the Upper Awash Basin, Ethiopia (Doko, Hailemariam Mengistu)
2026-03-25SICE Outstanding Student AwardExcellent character and academic performance (Noguchi, Ken)
2026-03-25Dean’s Award (School of Science and Engineering, University of Tsukuba)Outstanding academic performance and research achievements (Noguchi, Ken)
2026-02-19Ichimura Environmental Research GrantDeep Learning-Based Assessment of Renewable Energy Potential with International Collaboration (PI: Dairaku, Koji)
2026-01-22Best Presentation Award for Applied Research (SAT Technology Showcase 2026)Advancing Extreme Precipitation Modeling Using Data Fusion and Machine Learning (Muhammad, Umar Nadeem; Dairaku, Koji)
2025-05-19JSCE International Outstanding Collaboration AwardOutstanding contributions internationally to the improvement and advancement of civil engineering (Dairaku, Koji)
2025-03-25SICE Outstanding Student AwardExcellent character and academic performance (Llorin, Alyssa Gewell Agena)
2025-03-25Ezaki Prize (University of Tsukuba Alumni Association)Outstanding achievements in research activities during enrollment (Llorin, Alyssa Gewell Agena)
2025-03-25The Dean Award for Academic Excellence (Degree Programs in Systems and Information Engineering, University of Tsukuba)Local and Synoptic Influences on Long-term Trends in Rainfall over Metro Manila, Philippines (Llorin, Alyssa Gewell Agena)
2024-10-15Best Poster Award (Scientific Forum for Numerical Simulation of Asian Regional Climate Change and Earth System Process)Local and Synoptic Influences on Long-Term Trends in Rainfall over Metro Manila, Philippines (Llorin, Alyssa Gewell Agena; Dairaku, Koji)
2024-05Best Paper Award (EMCEI 2024)Local and Synoptic Drivers for Rainfall Formation over Metro Manila, Philippines (Llorin, Alyssa Gewell Agena; Dairaku, Koji)
2024-03-25Research Encouragement Scholarship (Tsukuba Scholarship, University of Tsukuba)Analysis of feedback process on water availability in Africa from the past to future (Nguyen, Ngoc Kim Hong)
2024-03-25Best Student Award (Degree Program in Engineering Mechanics and Energy, University of Tsukuba)Analysis of feedback process on water availability in Africa from the past to future (Nguyen, Ngoc Kim Hong)
2024-03-25Best Student Award (Degree Program in Engineering Mechanics and Energy, University of Tsukuba)Added Values on Wind Energy Potential for South Asia Using High-Resolution Climate Models (Khan, Muhammad Abid)
2024-03-25Best Student Award (Degree Program in Engineering Mechanics and Energy, University of Tsukuba)Impact of Climate Change, Land Use and Land Cover Change on the Hydrological Response in Upper Blue Nile Basin (Brhane, Ermias Sisay)
2023-07-09Best Presentation Award (International Young Scientists Forum 2023)Uncertainty Analysis of PERSIANN-family Precipitation Products over Himalayan Mountains of Pakistan, South Asia (Nadeem, Muhammad Umar; Dairaku, Koji)
2023-03-24Best Student Award (Degree Program in Engineering Mechanics and Energy, University of Tsukuba)Anthropogenic influence on extreme precipitation over East Asia (Adigun, Paul Ayodele)
2022-12AGU 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)
2022-03Outstanding Discussion Award (Conference on Hydraulic Engineering, JSCE)Outstanding discussions at the Conference on Hydraulic Engineering (Dairaku, Koji)
Articles
Conference, etc.
  • Heat Stress Analysis by Statistical Downscaling Over Vietnam and Cambodia Regions Towards Local Climate Risk Assessment
    Nguyen Ngoc Kim Hong; Dairaku Koji
    22nd 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
    22nd 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
    22nd 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...
    22nd 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 ...
    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 Ayo...
    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
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Teaching
2025-04 -- 2025-07Advanced DynamicsUniversity of Tsukuba.
2025-10 -- 2026-02Research in Engineering Mechanics and Energy IIbUniversity of Tsukuba.
2025-04 -- 2025-08Research in Engineering Mechanics and Energy IIaUniversity of Tsukuba.
2025-10 -- 2026-02Research in Engineering Mechanics and Energy IIUniversity of Tsukuba.
2025-04 -- 2025-08Research in Engineering Mechanics and Energy IIUniversity of Tsukuba.
2025-10 -- 2026-02Research in Engineering Mechanics and Energy IbUniversity of Tsukuba.
2025-04 -- 2025-08Research in Engineering Mechanics and Energy IaUniversity of Tsukuba.
2025-10 -- 2026-02Research in Engineering Mechanics and Energy IUniversity of Tsukuba.
2025-04 -- 2025-08Research in Engineering Mechanics and Energy IUniversity of Tsukuba.
2025-10 -- 2026-02Seminar in Engineering Mechanics and Energy IIbUniversity of Tsukuba.
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Other educational activities
2019-10 -- 2019-10Special LectureUniversity of Tsukuba
Professional activities
2026-03 -- 2028-03General Insurance Rating Organization of JapanMember, Subcommittee on Wind and Flood Disasters, Disaster Science Research Council (GIROJ)
2025-01 -- (current)Coordinated Regional climate Downscaling Experiment (CORDEX) Task Force on Machine LearningMember, CORDEX Task Force on Machine Learning
2021-06 -- 2022-03Saitama Prefectural Environmental Science International CenterVisiting Researcher
2018-04 -- 2024-09Science Council of Japan (SCJ)GEWEX Subcommittee Member, Joint FE-WCRP Working Group under the Environmental Sciences Committee and Earth and Planetary Sciences Committee
2018-01 -- 2020-03National Research Institute for Earth Science and Disaster Resilience (NIED)Staff Member, Branding Promotion Office
2016-11 -- (current)Coordinated Regional climate Downscaling Experiment (CORDEX)Asia Point of Contact (POC)
2016-10 -- 2024-12The Japan Society of Hydrology and Water ResourcesSecretary, Tsukuba Group, Editorial and Publication Committee
2014-10 -- 2016-10The Japan Society of Hydrology and Water ResourcesExecutive Secretary, Editorial and Publication Committee
2012-03 -- (current)Japan Society of Civil Engineers (JSCE)Member, Subcommittee on Global Environmental Hydraulics, Committee on Hydraulic Engineering,
2010-04 -- 2021-03Institute of Industrial Science, The University of TokyoResearch Fellow
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University Management
2025-04 -- 2027-03Public Relations Committee, Degree Program in Engineering Mechanics and Energy (EME)Public Relations Committee Member
2025-04 -- 2027-03Faculty Development(FD) Committee, College of Engineering SystemsFaculty Development(FD) Committee Member
2023-11 -- 2024-10Shinwa-kai (Faculty and Staff Association)Executive Committee Member
2023-11 -- 2025-10Career Committee, College of Engineering SystemsCareer Committee Member
2023-08 -- 2025-07Career Committee, Degree Program in Engineering Mechanics and Energy (EME)Career Committee Member
2023-07 -- 2024-04Specialized Committee for Entrance Examination Question Preparation, University of TsukubaMember of the Specialized Committee for Entrance Examination Question Preparation
2023-04 -- 2025-04New Student Orientation Committee & University Information Session Coordinator, College of Engineering SystemsCommittee Member for New Student Orientation and Coordinator for University Information Sessions
2021-04 -- 2023-03Public Relations Committee, Degree programs in Systems and Information EngineeringChair
2021-04 -- 2023-03General Affairs Committee, Degree Program in Engineering Mechanics and Energy (EME)General Affairs Committee Member (Administrative Affairs)
2021-04 -- 2023-03Faculty Advisor for StudentsFaculty Advisor for Students (Co-Chair, Class Liaison Meeting)
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(Last updated: 2026-03-25)