– ICLEI Japan Member Information –

Katsushika City

Message from the Mayor of Katsushika City 

Katsunori Aoki

In February 2020, Katsushika City became the first basic local government in the Tokyo Metropolis to declare ‘Zero Emission Katsushika’ to achieve net zero emissions by 2050. To achieve this goal, we are promoting environmental initiatives with the target of ‘Carbon Half’, a 50% reduction compared to the 2013 level by 2030.

To spread this movement to the entire Tokyo’s 23 wards (special wards), where more than 9.5 million people live, I called for cooperation toward zero carbon across the entire special wards at the Special Ward Mayors’ Association Meeting,  where the mayors of the 23 wards gather.
After two years of research and study, the ‘Zero Carbon City Special Wards Joint Declaration’ and an ‘Agreement with Three Megabanks to Support Decarbonization of SMEs’ were realized in October 2023.

To achieve a decarbonized society, it is important to work in partnership with various actors, including citizens, businesses, etc. In particular, strengthening cooperation between local governments and maximizing synergies will effectively promote climate action.

Overview of Katsushika City 

Katsushika is located at the northeastern end of Tokyo Metropolis and is the seventh largest ward in terms of total area. The Arakawa, Edogawa, and Obagawa rivers border the ward, and the Nakagawa, Shin-Nakagawa, and Ayasegawa rivers flow through the ward, enriching the city’s surrounding environment with water.

Katsushika is home to Katsushika Shibamata, Tokyo’s first area to be selected as a National Important Cultural Landscape, and is also a major attraction for the unique downtown Tokyo atmosphere and scenery depicted in the Japanese film ‘Otoko wa Tsuraiyo’ and the manga “Kochira Katsushika-ku Kameari Koen Mae Hashutsujo,” which are based on the area.

Basic Information

472,116

Population
(As of 1 July 2025) 

34.8

Area

Katsushika City Website

Environmental Initiatives 

In addition to reducing greenhouse gas emissions, Katsushika is also focused on solving other local issues. For example, subsidy schemes and preferential interest rates encourage the insulation of homes, thereby contributing to the development of a healthy and comfortable living environment.

Public facilities, including schools, are also promoting ZEB and insulation retrofits, contributing to the improvement of the educational environment. Furthermore, the subsidy scheme for photovoltaic power generation systems and storage batteries contributes to strengthening local resilience.

Katsushika will continue to promote climate action to achieve sustainable communities.

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