News Release​

A large-scale project along the Sobu Line, the "Minami-Koiwa 6-chome District Type 1 Urban Redevelopment Project, Block III Completed," a mixed-use redevelopment project in front of JR Koiwa Station, will contribute to creating a more vibrant and walkable area around JR Koiwa Station, improving the living environment, and strengthening local safety and security.

March 26, 2026

The Minami-Koiwa 6-chome District Urban Redevelopment Association (Chairman: Tsushi Tsuzuki, hereinafter referred to as the "Redevelopment Association"), its members, and Nomura Real Estate Co., Ltd. (Headquarters: Minato-ku, Tokyo / Representative Director President: Daisaku Matsuo, hereinafter referred to as "Nomura Real Estate"), MIRARTH HOLDINGS, Inc. (Headquarters: Chiyoda-ku, Tokyo / Representative Director: Kazuichi Shimada, hereinafter referred to as "MIRARTH HOLDINGS"), Shimizu Corporation Co., Ltd. (Headquarters: Chuo-ku, Tokyo, Representative Director President: Tatsuya Niimura, hereinafter referred to as "Shimizu Corporation"), have completed the completion of the "FIRSTA ^*1 III/Proud Tower Koiwa Front (hereinafter referred to as the "Main Building"), which is a "Minami-Koiwa 6-chome District Type 1 Urban Redevelopment Project (hereinafter referred to as the "Project"), which is currently promoting the plan. We would like to inform you that we will start moving in in March.
This building is located at the south exit of Koiwa Station and is a complex complex with residential, commercial, and approximately 3,000 public bicycle parking spaces operated by Edogawa Ward, and will be the final block of this project, following the completion of "FIRSTAI." (Block I facility building) completed in January 2021 and "FIRSTAII./Proud Tower Koiwa First" (Block II facility building) completed in May 2022.
*1: "FIRSTA" is the town name (district name) of each block of this project, and is a coined word consisting of "FIRST = first", "STATION = station/regional base", and "FESTA = bustle".

[Photos of completed buildings]

1. About this project

The Redevelopment Association was established in July 2012, the city planning decision was made in October 2014, and the establishment of the Redevelopment Association was approved in December 2016. After that, the rights conversion plan was approved in December 2018, and the construction of the new building of Block I began in May 2019.
This project is a facility plan divided into Block I, Block II, and Block III, and we have focused on the continuity of the block by taking advantage of the location in front of the station, and have been developing a space open to the community. In this project, in order to realize the "Basic Concept for Community Development * ² around JR Koiwa Station" formulated by Edogawa Ward in January 2009, we will create circulation and bustle with the ring road that will be developed in the form of multiple redevelopment projects and rezoning projects and these projects in the form of connecting these projects, and improve the safety and security of the living environment and the community. It is equipped with commercial functions and is intended to be renewed into a complex urban area.
Since receiving approval for the establishment of the Redevelopment Association in December 2016, Nomura Real Estate, MIRARTH HOLDINGS, and Shimizu Corporation have been involved in the promotion of this project as participating members of the reserved cooperative for acquiring residential and commercial reserved floors, as well as as as designated business agents.
*2: Edogawa Ward website (plan revised in 2019) https://www.city.edogawa.tokyo.jp/documents/935/2019.pdf

2. Facility Overview of "Proud Tower Koiwa Front"

This is a mixed-use redevelopment facility consisting of 367 residential units (including 9 non-sale units) in a 33-story above ground and 1-story underground building, as well as commercial facilities and a public bicycle parking area with approximately 3,000 spaces operated by Edogawa Ward. A deck on the second floor connects it to the adjacent "FIRSTA II / Proud Tower Koiwa First" (a facility building in Block II), creating a fitting hub at the entrance to the Flower Road shopping street, to which the project site belongs, and contributing to the formation of a three-dimensional pedestrian network.

[Cross-section view]

[Photos of completed buildings]

3. Business/Property Overview

(1) Overview of this project

Business name	Minamikoiwa 6-chome District Type 1 Urban Redevelopment Project
Builder	Minami Koiwa 6-chome District Urban Redevelopment Association
Geographic location;	2354 Minami-Koiwa 6-chome, Edogawa-ku, Tokyo (land number)
area area	Approximately 1.3ha
Main use	Commercial, residential, business, parking lots, public bicycle parking
Site area	Block I: Approximately 1,036 m2 Block II: Approximately 2,904 m2 Block III: Approximately 5,012 m2
Total floor area	Block I: Approximately 7,122 m2 Block II: Approximately 29,170 m2 Block III: Approximately 52,781 m2
Structure/scale	Block I: Steel frame construction / 10 stories above ground Block II: Reinforced concrete structure (partially steel frame) / 22 floors above ground, 1 basement floor Block III: Reinforced concrete structure (partially steel frame) / 33 floors above ground, 1 basement floor

(2) Proud Tower Koiwa Front Property Overview

Geographic location;	2354 Minami-Koiwa 6-chome, Edogawa-ku, Tokyo (land number)
Traffic information	3-minute walk from Koiwa Station on the JR Chuo-Sobu Line.
Structure/scale	Reinforced concrete structure (partially steel frame) / 33 floors above ground, 1 basement floor
Site area	5,012.37 m²
Number of housing units	367 units (including 9 non-sale units)
Floor plan	1LDK to 4LDK
Exclusive area	55.76 m² to 97.57 m²
Seller (Block III)	Nomura Real Estate Co., Ltd. MIRARTH HOLDINGS, Inc. Shimizu Construction Co., Ltd.
Design (block III)	Shimizu Construction Co., Ltd.
Construction (block III)	Shimizu Construction Co., Ltd.
Official Website	https://www.proud-web.jp/mansion/b115660/
Customer Inquiry Desk	Proud Tower Koiwa Condominium Gallery (TEL: 0120-358-367) Opening hours: Weekdays 11:00-18:00, Saturdays, Sundays, and holidays 10:00-18:00 Closed: Every Tuesday, Wednesday, and Thursday