TOYOCHEM CO. has announced that its can coating technology, developed jointly with Asahi Breweries, has been recognised with the Invention Award at the 2026 National Invention Awards.

The technology underpins Asahi’s popular “Draft Beer Can” (“Nama Jokki Kan”), and two TOYOCHEM engineers involved in its development attended the award ceremony held on June 15, 2026, at The Okura Tokyo.

A Coating That Turns a Flaw Into a Feature

Interior coatings are a standard feature in beverage and food cans, applied to prevent corrosion and to stop metal ions from migrating into the contents and altering flavour. TOYOCHEM has long supplied such coatings for canned beer, drawing on its knowledge of polymer design.

What sets the award-winning technology apart is that it deliberately works against a long-held industry assumption — that foam that erupts from a can upon opening signals a manufacturing defect. Instead, TOYOCHEM and Asahi turned that phenomenon into the product’s signature appeal.

The breakthrough centres on a specially engineered coating applied to the can’s interior surface, which forms a microscopic, crater-like textured pattern. The design layers two scales of surface unevenness: larger indentations measuring 5–20 micrometres in diameter, distributed at a density of roughly 200- 1,200 per square meter, combined with far finer textures under 0.5–5 micrometres, packed at high density. Together, these structures trigger a continuous stream of fine bubbles that respond to the pressure change the moment the can is opened — replicating the rich, creamy head associated with draft beer poured at a bar.

Reflecting on the honour, the TOYOCHEM engineers said they were deeply grateful that the coating technology behind the Draft Beer Can had been recognised. They noted that the project took shape when Asahi’s ambition — to reproduce the experience of restaurant-poured draft beer inside a sealed can — aligned with insights the TOYOCHEM team had gained from its earlier setbacks in coating development. The engineers expressed admiration for Asahi’s persistence in clearing the many technical hurdles that followed, and said contributing to that effort, even in a modest capacity, had been a source of genuine professional pride.

TOYOCHEM stated that it will continue pairing its proprietary polymer design and coatings expertise with customer needs, aiming to deliver products that create meaningful sensory experiences in partnership with its clients.