The Adoption Gap

The building industry says it wants circular materials. Its purchase orders say otherwise.

On 27 September 2026, generic environmental claims became illegal across the European Union. Since January, manufacturers have had to declare the carbon in every construction product they sell there. American states are writing carbon limits into public procurement. And in July 2026, Japan quietly passed a law that puts the whole-life carbon of buildings into statute.

None of it has closed the gap between what the industry says about sustainability and what actually gets specified, ordered and installed. Global circularity has fallen, not risen, over the decade in which "circular" became the most common word in corporate reporting. Ninety percent of architects say they prefer materials with verified environmental data. Twenty-two percent of manufacturers supply it. And every week, somebody has to fill in a purchase order.

The Adoption Gap explains why. Written from the platform side of the Japanese materials industry, where the author watches what designers actually request, specify, order and quietly drop, it argues that the gap is not hypocrisy but structure: a sequence of small, defensible decisions between a sample and an installed surface, each of which is cheaper for the person making it than the alternative. The conventional product does not win because it is better or cheaper. It wins because it arrives pre-decided.

Across seven chapters the book takes apart the usual explanations and replaces them with the mechanisms that actually operate:

• Why cost is almost never the variable that kills a specification, and the five costs that do
• Why the material sample is the most misunderstood object in the industry, and how the "sample drawer" absorbs interest and emits nothing
• What European, British and American rules on environmental language and data now require, and why the loophole for business-to-business sellers is closing in practice
• Why an industry built on surfaces that must never change is structurally unable to sell longevity, and what the ten-year question does to a specification
• How the sustainability role was designed, without anyone intending it, to be accountable for an outcome and powerless over every decision that produces it
• The seven features that the ordinary, unglamorous adoption cases share, and why the second order matters more than the first
• What Japan's 2026 law actually does, why a fine most companies would not notice will still move the market, and what that means for readers in Europe and the United States

The book ends with a one-page decision sheet for anyone who has to choose a material, and a regulatory calendar for the European Union, the United Kingdom, the United States and Japan from 2026 to 2030.

For architects, interior designers, specifiers, procurement leads, manufacturers' sales and sustainability teams, and anyone who has ever compiled a preferred-materials list and wondered why it never turned into an order.

Kusanonework writes on architecture, interiors, materials and spatial design from Japan for an international readership.