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Project Name:
The Nagoya Expo 2005 Tower

The 2005 World Exposition International
Organizing Committee

Nos. of Storeys:
50 Storeys @ 12m per storey (600 metres high)

Site Area:
Building Footprint = 2 hectares
Within overall site area = 150 hectares

Seto City, Nagoya, Japan

Date Start:
Design 1997

Construction Date:
2000 to 2005 (projected)
Design Features

"The Nagoya Expo 2005 Tower is the alternative proposal as the vertical option to the conventional horizontal layouts used in the previous Expos elsewhere in the world. This proposal is currently being considered by the Expo 2005 Committee.

The Expo 2005 Committee had earlier declared that the exhibition theme has to "express the need to reconsider the natural world through the adoption of an innovative attitude to urban planning, infrastructure, building design and information, proposing new standards for quality of life in an ecologically friendly environment".

The site is near Seto City in Nagoya in Japan and is a 150 hectare site with a pristine matured ecosystem (following a period of secondary ecological succession). It is contended here that to build the new Expo facilities on this site with an expected 25 million visitors trampling over this ecosystem will appear contrary to the declared intentions of the Expo Committee. It will likely generate an uproar from Environmentalists worldwide.

The vertical solution proposed here addresses the issue of the ecological sensitivity of the site by creating "artificial land" in the sky. In going vertical, the proposal will preserve more than two-thirds of the existing ecosystem of the locality.

The fundamental benefit of the vertical solution is that it will have a smaller building-footprint at the ground-plane (i.e. @ 2 Ha compared to that of the horizontal version @ 150 Ha). This vertical Expo will therefore avoid extensive land clearance and disruption to the site's existing mature ecology.

The Tower Design
The Tower will in effect be a working prototype of the "1000m Hypertower project" mooted and researched by the Japan's Ministry of Construction.

The tower will be 600 metres high and will have 50 segments of platforms @ 12m height that will enable the various pavillions to be built (up to 3 storeys) within each segment.

The tower's distribution of landuse within the 50 segments will be on the basis of a system of "horizontal" as well as "vertical" zoning of uses. Horizontal zoning enables pavillions and facilities to be located within one or more of the 50 segments of 12m height. Vertical zoning provides for certain pavillions and facilities to be accessible at all floors (e.g. the International Pavillion, the Japan Pavillion, the Administration/Security/Services Facilities, etc.).

The key circulation system is by means of a spiralling monorail with its twin tracks placed on the periphery of the tower with "stations" at 6 segment intervals (i.e. 2 minutes travelling time between stations). This connects to the LRT system at the ground-plane. In addition to these, there will be supplementary systems of elevators, escalators and inclined travelators. However as with most Expos, there will be a main Promenade for use by pedestrians from which all pavillions will be accessible. This Promenade in the tower will be in the form of a large gentle ramp that traverses from the ground-plane all the way up to the top of the tower.

Such a new urban development constitutes an opportunity to test the concept of the vertical organisation and integration of local resources, environmental demands and the specific needs of an international exhibition. The building's operational and environmental systems will address the challenges of the new century giving respect to nature in a technological response, using clean and efficient energy technologies and recycling systems.

The intention of the Expo 2005 Tower will demonstrate a new policy toward preservation of the natural environment and the freeing of existing urban landscape for vegetation. It will likely be an example for future urban expansion spaces (e.g. the proposed relocation of the Japan Government facilities outside Tokyo).
Project Team :
Kiyonori Kikutake (Project Leader)
Shizuo Harada
Ken Yeang
Tengku Robert Hamzah
3D rendering
elevation line drawing
3D rendering
nagoya expo 2001 3D rendering
nagoya expo 2005 plan
3D rendering
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