We would like to announce that the Tokyo Metropolitan Government has approved the establishment of the Ikebukuro Honcho 4-1 and 4-2 District Disaster Prevention Block Development Association, in accordance with Article 136, Paragraph 1 of the Act on Promotion of Disaster Prevention Block Development in Densely Populated Urban Areas, as follows.

1　Project effects

（1）Eliminating overcrowding by sharing buildings

The subdivided land and remaining private roads resulting from the construction of Auxiliary Route 82 will be consolidated through joint ownership, and fireproof buildings will be constructed to ensure rational and healthy use of the land.

（2）Improving disaster prevention capabilities

The project aims to improve the disaster prevention capabilities of the area by upgrading the densely packed old wooden houses to fireproof and earthquake-resistant buildings, and by installing manhole toilets and disaster prevention wells in the plaza on the premises.

（3）Creating a living hub in front of the station and improving the living environment

We will develop commercial and lifestyle support functions and urban housing to enhance local services, create a lifestyle exchange hub in front of the station, and improve the living environment in the area.

2　Name and location of the authorized association (implementer)

Ikebukuro Honmachi 4-chome 1-2 District Disaster Prevention Block Development Project Association
16-6 Ikebukuro Honmachi 4-chome, Toshima-ku

3　Name of the business

Ikebukuro Honmachi 4-chome 1-2 District Disaster Prevention Block Development Project

4　Enforcement district

Ikebukuro Honmachi 4-chome, Toshima Ward

5　District Overview

（1）District area

Approximately 0.2 hectares

（2）Plan Overview

1）Facility size

Total floor area: Approximately 5,646 square meters
Floors and height: 11 above ground and 1 below ground, approximately 34 meters high

2）Facility use

Apartment buildings, stores, etc.

3）Total project cost

Approximately 3.8 billion yen

6　Approval date

Tuesday, August 5, 2025

7　Effect of approval

With the approval of the business association’s establishment, the association will gain legal status, become the implementer of the disaster prevention block development project, and begin work on the project.

8　Future plans

Right conversion plan approved

Fiscal year 2025

Construction begins

Fiscal year 2026

Building completed

Fiscal year 2028

*Attachment: Map and Rendering (PDF: 438KB)

This project is an initiative to promote the “Tokyo 2050 Strategy.”
Strategy 21: Strengthening urban resilience: “Promoting urban development that is fire-resistant and fire-resistant”

Contact: Disaster Prevention and Urban Planning Division, Urban Development Department, Urban Development Bureau Phone: 03-5320-5142