About Us

The structural materials of the dome house are only wood, iron and concrete.

New Material

The world’s first 4th New Material: Special expanded polystyrene

Shikyo Apartment Yojitoku

Japan Dome House

Strength/durability Special processing has been applied to expanded polystyrene. Expanded polystyrene (styrofoam) is widely used as a cushioning material, and is known for its excellent insulation and cushioning properties as well as being extremely lightweight. In the Japan Dome House, we took advantage of this characteristic and, through special technology, succeeded in making it strong enough to be used as a structural material. Furthermore, it has undergone multiple special treatments, such as flame retardant treatment and UV protection coating, compared to general polystyrene foam, making it highly durable.

Safety No harmful substances are used at all. Expanded polystyrene is made only of hydrogen and carbon and is molded using steam, so no harmful substances are used, and no dioxins are generated even when incinerated. Additionally, since formaldehyde is not used, there are no issues such as sick house syndrome. This is a safe and secure material that is gentle on the body, containing no substances harmful to the human body.

Environmental Symbiosis This is a new, future-oriented material designed with environmental symbiosis in mind. With its high insulation and airtightness providing energy-saving effects, resource-saving by producing only the necessary amount through mold forming, and a non-CFC manufacturing process that helps prevent global warming, expanded polystyrene does not place a significant burden on the Earth at any stage, from production to use. It can be said that this is a future-oriented material designed with environmental symbiosis in mind.