Adachi (足立区, Adachi-ku) is a special ward in the Tokyo Metropolis in Japan.

The ward is bordered by the cities of Kawaguchi, Sōka and Yashio in Saitama and Katsushika, Sumida, Arakawa and Kita in Tokyo.

Under the Ritsuryō system, the present-day ward was the southern extremity of Adachi District, Musashi Province.

The west site has sports facilities such as an athletic stadium, tennis courts and baseball grounds.

The east site has a big pond, water park and bird sanctuary.

The park can be accessed by arriving at Toneri-kōen Station on the Nippori-Toneri Liner or by bus.

Urban Agricultural Park (Toshi Nōgyō Kōen), located in Shikahama, is run by Adachi Ward.

There are fields, orchards, greenhouses and other facilities that aim to show farming techniques that have been adopted in the suburbs of Tokyo.

The rest house is at the point where the Arakawa and Shibakawa cycling roads meet.

The Tokyo Budokan has an avant-garde building designed by a famous architect Kijō Rokkaku.

It contains two main facilities: Nishiarai Culture Hall (theatre) and Adachi Children's Science Museum.

The city's public high schools are operated by the Tokyo Metropolitan Government Board of Education.