Daily Bulletin “From Japan to Bali”
Key Messages from Japanese Stakeholders
10th World Water Forum - Water for Shared Prosperity

JAPAN WATER FORUM
21 May 2024 - Bali, Indonesia❶ Keynote Lecture

The Bandung Spirit Water Summit
by His Majesty the Emperor of Japan
Video: www.kunaicho.go.jp❷ Nature-based solutions and ecosystem protection and restoration to improve water supply

The effective deployment of nature-based solutions andhealthy water-related ecosystems are essential to ensure water and economic resilience to shocks and longterm prosperity. The session focused on showcasing thebest practices and challenges for the implementation ofnature-based solutions for sustainable water supply.

Ecosystem Services of Paddy Fields as GreenInfrastructure
NODA Keigo, Associate Professor at theUniversity of Tokyo• Multiple benefits from paddy fields as green infrastructure: groundwater recharge, flood mitigation, desalinization. No maintenance costs are required.
• Combination of green and grey infrastructure, suchas dams and canals, is necessary to supply ecosystemservices.

• Traditional circular levees resisted better to the1976 flood in Anpachi than modern ones.

Sustainable Water Resources Management inAsia: A Sociocultural Perspective
ISHIWATARI Mikio, Board Director, Japan Water Forum• Local knowledge, traditions, and customs need to be
integrated to incorporate sociocultural aspects.
• Cooperative approach is key, especially community
participation.
• Indigenous knowledge useful to adapt to climatechange with state-of-art technology.

Novel Approaches in Flood Management
Policies in Japan: Integrating Sociocultural
Wisdom in Climate Change Adaptation
IKEUCHI Hiroaki, Chief Official, Ministry ofLand, Infrastructure, Transport and Tourism• New policy of River Basin Disaster Resilience andSustainability by All to adapt to climate change.
• Traditional measures are used, in addition to conventional structure measures.
• Storage function preservation area approach inspired by the open levee indigenous method.

Seeking Ways to Improve Nature-Based Solutions in Agriculture
MATSUSHITA Kyohei, Professor atShiga University• Externalities are the mechanism through which agricultural nature-based solutions improve our welfare.
• Additional costs may be incurred upon by farmers toprovide important external values for our well-being.
• Payment for ecosystem services may compensate as
government support or market price premium.

❸ Incorporating Sociocultural Dimensions inWater Resources Management: Policies, Practices, and Challenges

The session emphasized the need for policies and strategies that integrate sociocultural aspects into water resource management. The lessons learned underscorethe importance of integrating local knowledge, traditions, and customs into water resource management
approaches, promoting cooperative governance, andadapting strategies to evolving sociocultural dynamics.

Sociohydrological Development in Japan
OKI Taikan, Vice-President of the Japan WaterForum (2024 Stockholm Water Prize)• Evaluate the benefits of flood management systems,in coproduction with local communities.
• Use the results of such evaluation to build consensus in the community.

❹ Smart Water Management for Resilience andInclusive Water Services

Water scarcity is a growing issue. According to several
UN reports, it will directly affect nearly 20% of the human population by 2025. By 2040, roughly 1 in 4 children worldwide will be living in areas of extremely highwater stress. Smart water management systems canprovide a more resilient and efficient water supply system, reducing costs and improving sustainability.

Introduction to Japanese Initiatives on Sewage Management
KUDO Makoto, Director for Overseas Projectsof Water Supply and Sewerage; Ministry ofLand, Infrastructure, Transport and Tourism• Comprehensive flood control by sewerage needs tocombine hardware and software.
• Circular economy of wastewater management. Artificial intelligence used for energy saving.
• Cooperation with other countries through the Asia
Wastewater Management Partnership for SDG 6.3.

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