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General information

  • Home page
  • Location address
    3-2-15 Harumi, Chuo-ku, Tokyo
  • Location country
  • Year of construction
  • Name of the client/building owner
    Mitsubishi Estate Co., Ltd
  • Function of building
  • Degree of enclosure
    Hybrid structure
  • Number of layers
  • Type of application of the membrane


Denka Company Limited adopted their TEFKA® high performance fluoride film to be used in the CLT PARK HARUMI Pavilion, an event facility under the supervision of renowned architect Dr. Kengo Kuma. This pavilion is the symbol of CLT PARK HARUMI that stands at the heart of the facility. It is a relaxation space with an artificial lawn that is usually open to public. In future, it will be leased to tenants organizing a diverse array of events.

So, for this project Denka has been working to extend the applications of their film product to architectural membrane structures. TEFKA® is a copolymer film made of ethylene and chloro-trifluoro-ethylene (ECTFE) not only with high transparency and light transmissivity either equivalent to or more than glass but also superior weather resistance, flame retardancy, secondary processability, developed out of a long-term-accumulated Denka’s fluoride film production and processing technologies. It is the first of Denka’s products to be adopted for structures using cross-laminated timber (CLT) which is a wood-based material created by laminating and bonding wooden boards in a way in which their grains are orthogonally crossed.

Architect Dr. Kengo Kuma described this new material as follow: “TEFKA® is lighter than glass and so pliable as to be rolled to transport it. It is ideal material for relocation and reconstruction. It also has the perfect transparency we have sought.”

Description of the environmental conditions

General comments, links


Material of the cover

  • Cable-net/Fabric/Hybrid/Foil
  • Material Fabric/Foil

Main dimensions and form

  • Covered surface (m2)
  • Form single element
    Flat appearance

Duration of use

Involved companies