The building was designed by world-renowned architect Kengo Kuma, known for his emphasis on natural materials and wooden lattice work.
The structure is a pioneer in the 'public-private partnership' model for government buildings in Japan, sharing space with a private condominium tower.
The 10th-floor rooftop garden is open to the public and is designed to mimic a natural forest ecosystem within the city.
The building's construction was a central piece of the 'Ikebukuro International Art and Culture City' redevelopment initiative.
It is one of the tallest government buildings in Tokyo that incorporates significant residential units in the same structural footprint.
Toshima City Office is a high-rise civic building integrated into the Hareza Ikebukuro complex, a major urban redevelopment project in Tokyo. The facility occupies the lower floors of a 49-story skyscraper that combines municipal government functions with luxury residential apartments. The office features a distinct public roof garden on the 10th floor, known as Toyo-no-Mori, which offers views of the surrounding Ikebukuro district. Designed by Kengo Kuma & Associates, the building incorporates wooden motifs and open, transparent architectural elements to contrast with traditional government offices. It serves as the primary administrative hub for Toshima City, handling residency, taxation, and welfare services. The complex is physically connected to the Toshima Public Hall and several commercial spaces. Its design focuses on environmental sustainability and earthquake resistance. The building serves as a modern landmark for the neighborhood's ongoing gentrification.
The 10th-floor Toyo-no-Mori roof garden, which provides a clean architectural perspective of the glass facade and local greenery.
Visit the 10th-floor rooftop garden for a calm, elevated view of the Ikebukuro skyline.
The building is part of the larger Hareza Ikebukuro complex, which includes several theaters and restaurants worth exploring in one trip.
Check the official city website for special seasonal exhibitions or public workshops held in the community spaces.
Do not attempt to enter private residential sections of the building, which are secured separately from the public civic offices.
Closed on weekends and national holidays, though the public outdoor garden areas may have different access protocols.
Maintain a quiet volume in office areas, as this is a functioning government building; photography is restricted in areas handling private resident data.
