Production locations
- Japan (Fukui)
Working conditions & living wages
The brand owns its own factory in Fukui and describes its frames as handmade by skilled craftspeople. MASUNAGA works within a long craftsmanship tradition built on an in-house, cooperative workshop culture.
There is, however, no information on social audits or certifications.
Materials
- Titanium
- Acetate/Plastic
- Metals
- 18K gold
Packaging
- There is no information about packaging materials.
Water usage & chemicals
Metal-frame production typically involves plating and titanium processing, both of which use water and chemicals. The brand shares nothing about how it manages chemicals or wastewater, and no relevant standards are mentioned.
Circular product design
MASUNAGA describes its frames as timeless and built to last. However, there is no information on design for repair or modularity.
Circular business models
The website mentions no repair service, spare-parts programme, take-back scheme or resale offer. Nevertheless, quality frames can often be repaired or re-lensed through an optician.
Distance & complexity of the supply chain
- Fukui
Design and manufacturing are integrated under one roof in Fukui. What is not disclosed is where the raw materials are sourced and processed.
Transportation
There is no information on how products are shipped from Japan or on any efforts to reduce transport impact.
They appear to contain no animal-derived materials.
Product design
MASUNAGA focuses on minimal, elegant, timeless frames inspired by architecture and culture rather than seasonal hype. The designs are meant to be worn for years.
The brand runs a steady core collection and gradually adds new models and colours.
Transparency on product
Frames are sold through opticians and authorised dealers, which means the detailed information reaches customers in-store, via the optician.
Transparency on processes
The brand is very open about its history and craftsmanship, but shares little about its environmental impact or social practices.
Conclusion
Are you looking for timeless eyewear? Discover MASUNAGA and find out on the COSH! map below where you can try the frames near you.
