- Architectural Institute of Japan
- The City Planning Institute of Japan
- Association of Urban Housing Sciences
- The Tokyo Institute of Architects
- Tokyo Association of Architects and Building Engineers
- Osaka Association of Architects and Building Engineers
- Aichi Association of Architects and Building Engineers
- Tokyo Association of Architectural Firms
- Osaka Association of Architectural Firms
- The Institution of Professional Engineers, Japan
- Japan Structural Consultants Association
- Japan Building Mechanical and Electrical Engineers Association
- Urban Renewal Association Japan
- Planning Consultants Association of Japan
- Urban Renewal Coordinator Association of Japan
- Japan Society of Seismic Isolation
- Public Buildings Association
- Research Institute of Educational Facilities
- Japan Housing Association
- Association of New Urban Housing Technology
- Japan Institute of Health care Architecture
- Japan Council Of Shopping Centers
- Japan Society of Commercial Space Designers
- Japan Tourism Facilities Association
- City Planning Association of Japan
- Institute for Future Urban Development
- The Tokyo Chamber of Commerce and Industry
- Structural Research Consulting Association
- Japan PFI Association
- Japan Society of Environmental Crematory

- Planners, Designers & Engineers Collaborative Inc.(PDEC)

Co-House.net (Internet site about Corporative house. Run by PDEC)
http://www.co-house.net/