Kumamoto City:  Mayor Kazufumi Onishi

Kumamoto City, called a “City of Trees,” is blessed with rich aquatic resources such as the clean groundwater that supplies all 740,000 of its inhabitants with water. In order to educate the coming generations of the importance of these resources, the city has been actively implementing measures to conserve the groundwater, issuing the “Declaration of the Environment Conservation City” and the “Declaration of the Groundwater Preservation City.”

Because of these efforts, the city received the ‘Water for Life’ UN-Water Best Practices Award in 2013 and is highly recognized internationally.

Since Kumamoto City recognizes the importance of cross-border, city-to-city cooperation in order to address environmental issues such as global warming, it joined ICLEI in 1995, and has been working toward realizing a low-carbon city since.

Kumamoto City will continue to cooperate with ICLEI and act responsibly for the future generation, in order to create a sustainable society.

Overview of Kumamoto City


Population:Approximately 740,000 (As of April 2016)

Kumamoto city is located on a plateau at the center of the Kyushu region, outlined by a volcanic belt, of which Mount Kinpu has the highest peak, and Mount Tatsuda, which lies along this belt. Its eastern part consists of hilly areas made by the Aso volcanic group, and its western part features plains formed by the Shirakawa Delta.

Since Mount Kinpu separates Kumamoto City from the Ariake Sea, the city’s climate mirrors inland basin weather conditions, and the temperature changes are drastic throughout the year. Its change in season from winter to spring comes quickly, and its summers tend to be long.

Environmental initiatives
In terms of Kumamoto City’s efforts to protect the environment, the city has developed the “Kumamoto City’s Strategic Plan to Create a Low-Carbon City” in order to work toward transforming into a low-carbon society. With citizens, corporations and local agencies working as one, Kumamoto City is implementing global warming mitigation measures, promoting renewable and low-carbon energy.

Furthermore, in order to effectively communicate Kumamoto City’s pride-worthy groundwater to the rest of the world, the city is implementing measures for groundwater preservation. With the collaboration of citizens, corporations, and the local agencies, the city is adopting measures to maintain groundwater recharge such as flooding converted paddy field, as well as maintaining watershed protection forests.

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