TOSTEM’s design and technology are inspired by an intimate familiarity with the beauty-and severity-of Japan’s four seasons. They deliver not only superior performance but also capture and frame the natural scenery beyond, letting you appreciate and enjoy the grandeur of nature throughout the changing seasons. Focusing on quality and reliability, TOSTEM delivers new value from Japan to homes around the world.

 

Our goal is for people to coexist with nature without placing an unsustainable burden on the environment. TOSTEM is contributing to the realization of a more sustainable society in several way, such as reducing CO2 emissions through energy-saving windows and doors, recycling waste materials, and organizing activities for children on the importance of protecting our environment to safeguard our lives for the future.