UNION: Ultimate Craftsmanship That Enhances the Value of Spatial Creation

UNION is an architectural-hardware manufacturer with an uncompromising commitment to design, creating products that enhance the value of entire spaces.
Embodying the idea that God is in the details, we pursue unique products that unite beauty and function at a high level under our ARTWARE design philosophy, rather than treating them as mere components.
Our product families—including ARCHISM architectural hardware, STYLIO interior joinery and storage, and PREGANO hotel-room hardware—harmonize with diverse settings and greatly enhance their spatial value.
We also contribute to Japanese design culture through activities including participation in Expo 2025 Osaka, Kansai, Japan, Junzo Talk conversations with emerging architects, and the Union Foundation for Ergodesign Culture.
This exhibition focuses on sand casting, an ancient casting technique passed down since our founding that allows a single handle to be produced from a single design. Through displays of the process, documentation and materials that make up a handle, experience our enduring spirit of making and ultimate craftsmanship.