Toshima Midori Disaster Prevention Park IKE・SUNPARK — Triple-Integrated Model of Mint Bureau Site + Disaster Park + Park-PFI
Located on the former Mint Bureau Tokyo Branch site (1.7 ha of 3.2 ha total) in Higashi-Ikebukuro, Toshima Ward, IKE・SUNPARK is a triple-integrated model combining UR-led park development, Toshima Ward's Park-PFI (public offering for revenue facilities), and disaster prevention functions. Partially opened in July 2020 and fully opened in December 2020, with the designated manager operated by a joint venture of Hibiya Amenis and NTT Urban Value Support (the broader project team spanning design and construction comprises 4 companies).
TL;DR
- IKE・SUNPARK is a disaster prevention park developed on 1.7 hectares of the former Mint Bureau Tokyo Branch site (approximately 3.2 hectares total) in Toshima Ward
- Toshima Ward and UR (Urban Renaissance Agency) selected the private operator through public offering, with revenue facilities separately offered under Park-PFI
- The designated manager is a joint venture of Hibiya Amenis and NTT Urban Value Support, while the broader project team spanning design and construction comprises 4 companies; partial opening in July 2020 and full opening in December 2020
Project Overview
Verified information from primary sources: opening date, operator, target area, location
Former Mint Bureau Site
approx. 3.2ha
park portion 1.7ha
Full Opening
Dec 2020
partial opening July
Designated Manager
2 companies
Joint venture
Toshima Midori Disaster Prevention Park IKE・SUNPARK is located at Higashi-Ikebukuro 4-42, Toshima Ward, Tokyo. The site was originally approximately 3.2 hectares of national land where the Mint Bureau Tokyo Branch was located; 1.7 hectares became the target for park development, partially opening in July 2020 and fully opening in December 2020. In response to local residents' requests for evacuation space, Toshima Ward partnered with UR (Urban Renaissance Agency) to advance park development.
The designated manager is a joint venture between Hibiya Amenis and NTT Urban Value Support; the broader project team spanning design and construction adds Toshi Keikaku Kenkyujo (都市計画研究所) and Kabuki Kensetsu (株木建設), totaling 4 companies. Main facilities include a lawn plaza, playground equipment, health exercise plaza, café, KOTO-PORT (revenue facility), and wooden deck.
Triple-Integrated Model
Three-stage collaboration of national land transfer, disaster prevention park development, and Park-PFI revenue facilities
IKE・SUNPARK's distinctive feature is the layering of three systems. First, transfer of national land to the municipality. Second, development as a disaster prevention park. Third, private operation of revenue facilities through Park-PFI.
| Stage | Content | Entity |
|---|---|---|
| National land transfer | Site use plan examined following Mint Bureau relocation to Saitama | Ministry of Finance, Tokyo, Toshima Ward |
| Disaster prevention development | Temporary evacuation sites, storage, manhole toilets integrated with normal functions | Toshima Ward + UR |
| Park-PFI revenue facilities | Café + KOTO-PORT separately offered and privately operated | Toshima Ward (Park-PFI offering) |
National land transfer to the municipality was triggered by the Mint Bureau Tokyo Branch's relocation to Saitama City. During deliberation over the site's use plan, local residents strongly requested park development as evacuation space. After consultation with Tokyo Prefecture and the Ministry of Finance, Toshima Ward finalized the park development policy.
Two-Tier Offering Structure
Separation between UR + Toshima Ward park development offering and Park-PFI revenue facility offering
IKE・SUNPARK's offering is designed with a two-tier structure. The upper tier (park development side) was jointly implemented by Toshima Ward + UR, offering and selecting the operator for park development + designated management. The lower tier (revenue facility side) was separately offered by Toshima Ward as a Park-PFI, selecting the operator for highly commercial revenue facilities.
This two-tier offering structure differs from Park-PFI's standard offering method. Standardly, a Park-PFI certified plan submitter offers and develops revenue facilities + designated park facilities as an integrated unit. At IKE・SUNPARK, however, the upper-level plan for disaster prevention park development pre-determined park development, and Park-PFI was then offered as an addition for revenue facilities—an order of operations.
Role Division Between Designated Manager and Project Team
Role division between the 2-company designated manager joint venture and the 4-company project team spanning design, construction, and management
IKE・SUNPARK's designated manager is a joint venture between Hibiya Amenis and NTT Urban Value Support (2 companies). The broader project team spanning design and construction also includes Toshi Keikaku Kenkyujo (都市計画研究所, design) and Kabuki Kensetsu (株木建設, construction), totaling 4 companies. Hibiya Amenis serves as the lead company overseeing the overall project, while NTT Urban Value Support handles facility maintenance.
The characteristic of role division is that the park/greenery specialist (Hibiya Amenis) handles on-site operations, while the NTT group operating company (NTT Urban Value Support) handles maintenance. The project team, including design and construction specialists, addresses the complex needs of an urban disaster prevention park. Notably, this park combines the Designated Manager System with Park-PFI.
Implications for Other Municipalities
Preconditions for replicating the national land redevelopment + disaster prevention park scheme
Three points must be considered by municipalities referencing IKE・SUNPARK.
First, private utilization of former national land sites requires trilateral consultation among the Ministry of Finance + Tokyo Prefecture (or other prefectures) + municipality. Such opportunities arise only when large-scale relocations occur, as in the Mint Bureau case. However, municipalities can enable opportunity capture by tracking national land trends during normal times.
Second, the combined disaster prevention park + Park-PFI model effectively balances normal-time vibrancy with emergency-time evacuation function, but one must recognize that revenue facility business viability is constrained by disaster prevention functions. Balancing normal-time revenue with emergency-time response should be pre-considered from the perspectives of operating hours, facility placement, and equipment specifications.
Third, the two-tier offering structure enables separate operator selection for park development + revenue facilities but risks impairing spatial design consistency between the two. At IKE・SUNPARK, UR + Toshima Ward's integrated design mitigated this concern. Other municipalities should explicitly state spatial design principles in upper-level plans.
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