Design and technology refined through
Innovative ideas for good living
Lifestyles are constantly evolving. At TOSTEM, we anticipate and adapt to the changing times, continuing to innovate and enrich the world around us.
We are spearheading new technologies in Japan and around the world focusing on outstanding design and ease-of-use.
In Japan, we are driving the evolution of windows through advances including our "smart-light structure," which uses high-performance five-layer glass for maximum insulation with reduced weight, and a "frame-in structure" with an improved design that maximizes glass surface area.
For our entrance doors, we are introducing new technologies, such as a locking system that provides both security and convenience and an automated system for opening and closing sliding entrance doors.
For more information on TOSTEM’s superior technologies, please see the Japanese site.
Window insulation improvement (Japanese only)
Improved entryway door locking / unlocking system (Japanese only)
Introduction of an automatic opening and closing system for sliding entryway doors (Japanese only)
The hybrid window -
technology and innovation
TOSTEM - the leading name in hybrid windows.
Most window frames are made of either aluminum or PVC. Aluminum is strong and durable but conducts heat easily, while plastic insulates well but is susceptible to weathering. Hybrid windows cleverly combine the advantages of both.
Japan’s climate means that windows must perform well in the heat and humidity of summer as well as the biting cold of winter. TOSTEM brand hybrid windows set the standard.