PROJECTS

NAGASAKI STADIUM CITY PROJECT

NAGASAKI STADIUM CITY PROJECT

Aiming to be a "role model for private-sector-led regional revitalization," this project to build and open Japan's first privately-built and privately-operated stadium and arena complex saw us handle project management (PM) and Construction Management (CM) for the main structure and related construction work.
In response to the client's request to "conduct a study of business viability and construction plans in parallel," we organized the issues along three axes: "integrating and promoting the project," "streamlining and optimizing the process," and "improving planning and rationality," in order to maximize the appeal of the facility while ensuring business viability (monetization).
We created a system that enabled decision-making among the diverse stakeholders across multiple construction zones, and resolved each issue while exploring the feasibility of the project. In addition to planning the construction process and schedule, we also adjusted the construction zones, thereby shortening the overall construction period by approximately one month. We also unified cost management, and achieved the opening within the target cost.
The concourse and stadium seating are open on a daily basis, creating a facility that is loved by local residents.

DATA

Year of completion2024
LocationNagasaki Prefecture, Nagasaki City, Saiwai-cho 7-1

Google map

Building usage Public, cultural and sports facilities, accommodation facilities, commercial facilities, offices, parking lots
Site area74,711.78㎡
Total floor area194,684.89㎡
Scale14 floors above ground
structureRC, S
Details of the Award

・ JIA Architects of the Year 2025 Top 100 Works (The Japan Institute of Architects (JIA)/Japan, Japan)

・TheStadiumBusiness Design & Development Awards 2025 (TDA25) Concourse Activation Award (PEACE STADIUM Connected by SoftBank) (Xperiology/UK)

・GOOD DESIGN AWARD 2025 (Japan Institute of Design Promotion (JDP) /Japan)

・ Construction Management Commendation 2025, Award of Excellence of Commendation (Construction Management Association of Japan /Japan)

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Our BusinessCM (Construction Management), Project Management
concept designTakenaka Corporation, Environment Design Institute
schematic designEnvironment Design Institute and Yasui Architects & Engineers JV
design development and Construction SupervisionHotel, commercial, stadium: Takenaka Corporation
Arena Office: Toda Corporation
Parking: Matsuo Construction
ConstructionHotel, commercial, stadium: Takenaka Corporation JV
Arena Office: Toda Corporation JV
Parking lot: Matsuo Construction JV
Photo creditJapanet Holdings
A bird's-eye view of the stadium. You can see the entire stadium from the rooms at Stadium City Hotel Nagasaki, seen on the left.
View of the stadium from the Royal Suite
View of the home stands from the upper level of the stadium
2nd floor arena entrance
Approach to the third floor. The arena is in the foreground, and the office building is in the background.
Basketball game at the arena
View of Stadium City Hotel Nagasaki (left) and office building (right) from the east
View of the stadium (back left) and commercial building (right) from the Urakami River side
Evening view of Nagasaki Stadium City from Inasa Bridge (from left: arena, stadium, commercial building)

Taking on an unprecedented project by solving problems based on three axes

In carrying out Japan's first privately-owned and operated stadium and arena complex construction and opening project, we supported the realization of this project through the following initiatives:

"Project integration and promotion"
In order to balance the pursuit of the client's vision and the realization of the construction project, we built and managed a platform for collecting ideas from all parties involved, over 50 companies, and for decision-making. This has made it possible to efficiently collect ideas and smoothly realize the client's vision.
- Selection of design and contractor for each work by preference system
・Selecting designers who can maximize the capabilities of all involved parties (interior, lighting, etc.)
・Facilitating ongoing meetings with the CMR to allow each company to share ideas and opinions, etc.

"Process streamlining and optimization"
Even with the limited construction time, we were able to secure sufficient time for business review and open the stadium at the same time as the opening game, so we set and managed the schedule while taking into account the business review period. We were able to shorten the overall construction period and open the stadium as scheduled.
・Plan and manage schedules to resolve outstanding business issues and other issues in the next process
・Early participation of construction staff to shorten construction time and streamline construction
・Full support from CMR in adjusting work sections and carrying out other construction work, etc.

"Improvement of planning and rationality"
In order to simultaneously pursue "improving planning and business viability" and "reducing construction costs," we implemented cost reductions that did not impede profitability. By considering and devising orders that met the client's requests, we ensured a balance between construction costs and profits.
・Selection of specifications that are well balanced with consideration for profit/non-profitability
・After separating over 100 items, we decided on the specifications and placed orders with each specialist company.
・Controlling price increases through early creation and sharing of handling rules, etc.

Update : 2025.08.04

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