The aim of the Water Cycle Data Integrator (WCI) unit is to promote research activities, education, and operational implementation of the data integration approach for addressing water cycle related issues. Integration of Earth observation data with local measurements and information on water cycle and water-related fields including climate, food, health, energy, biodiversity as well as disasters and economics is essential for holistic understanding of water cycle variability changes, improving capability to predict them, quantitatively evaluate their impact on society, and propose adequate adaptation measures. Such data integration function has been enabled by the Data Integration and Analysis System (DIAS), which was launched in 2006 at the University of Tokyo and has been progressing towards provision of operational services. The WCI unit pursues maximum exploitation of DIAS as a data information infrastructure for generating public benefits at both domestic and international scene.

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Create scientific knowledge

Creating new, value-added scientific knowledge through integration and analysis of "big data".


Systematic education using the scientific knowledge acquired through data integration and information fusion.

Generate public benefits

Contributing to global problem solving by providing pertinent and actionable information for decision-makers.


By integrating data from satellite- and ground-based Earth observations and outputs from climate and numerical weather prediction models with geographical and socio-economic information, we investigate water cycle variations and its possible future changes and provide vital information for integrated water resources management practices including efficient water usage as well as mitigation of water-related disasters. Using DIAS, we create a data integration platform to combine hydrological models with data and models from various fields such as climate, agriculture, biodiversity, urban planning, disasters, and economics. Using river basins as units of the land water cycle system and through collaboration with governments and local communities, we carry out and demonstrate pilot studies that provide sound information for solutions.

Expected Effect

Through cooperation and coordination among national and international research groups and institutes, we will stimulate data and information integration for the water cycle related fields and promote the use of DIAS for practical and operational applications for supporting decision making and planning. We also aim to initiate cooperation with various stakeholders by advancing efforts to combine analysis methods, data assimilation techniques, and prediction models that extend beyond any one field. By these actions, we will contribute to generation of scientific knowledge, which will help us to discover the wisdom needed for attaining the humanistic goal of sustainable development. At the same time, we hope to foster creation of an environment, where such knowledge and wisdom can be widely shared.

Reseach and Education Activities

  • Development of a watershed management tools that consider global change effects including changes in climate as well as socio-economic activities
  • Research into and development of a flood and drought early warning system
  • Organizing International Summer Program
  • Offering graduate lecture "Environment, Disaster, Data and Information Integration Studies"
  • Publication of Water cycle data integration studies

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Unit Member

Planning, designing, and development of a workbench to promote multi-discipline cooperation. Development of tools for supporting the decision-making process of policy makers based on integrated information. Supervising surveys, research, and educational activities on environmental problem solving and planning.

Toshio KOIKE, Professor


Exploring new practical research fields by promoting multi-disciplinary research and conducting surveys and research for supporting decision-making process, problem solving, and addressing water-related social issues. Creating an academic platform supporting inter- disciplinary (among academics) and trans-diciplinary (between academics and society) cooperation in the water cycle and water-related fields.

Akiyuki KAWASAKI, Associate Professor


Serving as an International Coordinator of the Unit activities. Promoting international collaboration, assisting in the development of an academic foundation using DIAS and promoting integration of water cycle related models and tools.

Petra KOUDELOVA , Research Associate

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25 July – 5 August, 2016

2016 Summer Program: Sustainable Water Management in an Era of Big Data

The WCI group, the University of Tokyo and the International Centre for Water Hazard and Risk Management (ICHARM) held a Summer Program from 25 July through 5 August 2016.

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1-2 March, 2016

Asian Water Cycle Symposium 2016

The Symposium will focus on flood and drought issues in the Asia-Pacific region from the viewpoint of the post-2015 framework (Sendai Framework) for disaster risk reduction (DRR), which was adopted at the third World Conference on DRR in Sendai, Japan, March 2015.

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This Unit was established on 1 June 2014 with the support of Nippon Koei Co., Ltd. It is the oldest independent consulting firm in Japan, which has been providing consulting services for economic development projects since 1946. Their managers and engineers provide strong engineering solutions by planning, designing and supervising construction of infrastructure projects in the fields of energy, transportation, resources, urban and public sector development.

Nippon Koei press release on the Water Cycle Data Integrator Unit (in Japanese)

Department of Civil Engineering
The University of Tokyo

Corporate Sponsored Research and Education Unit

Water Cycle Data Integrator

Contact Us
  • Room #113, Engineering Bldg #1
    7-3-1 Hongo, Bunkyo-ku,
    Tokyo 113-8656, Japan
  • TEL: +81-3-5841-6108
    FAX: +81-3-5841-6130
  • Email: wci@hydra.t.u-tokyo.ac.jp