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At TOSTEM, we believe good design shapes the way we live.
Our products are crafted to bring comfort, clarity, and a sense of connection to everyday life.
Guided by innovation, we create solutions that blend form, function, and ease of use to enhance living spaces.
Our quality comes from full control at every step, ensuring consistency and lasting reliability.
With a focus on sustainability, we choose smarter materials and responsible processes to support better living.
Design That Elevates Everyday Living
A home is more than just a place to live. It’s where life unfolds, memories are made, and inspiration begins. Every product we create is designed to enrich the quality of space and how people experience it.
From seamless indoor-outdoor transitions to clean, refined aesthetics, our windows, doors, and interior solutions bring comfort, connection, and clarity to everyday living. Guided by timeless Japanese wisdom and shaped by a globally recognized design team, our products have earned international acclaim, showing that good design starts with a deep understanding of how people live.
Innovation That Makes Life Better
We never stop innovating. We study how people live, anticipate changing needs, and create solutions that simplify life and inspire better living.
From our TEXGUARD anodized finish, engineered for long-lasting beauty to the smooth, space-saving ATIS Tilt & Slide window, our innovations are made with people in mind.
Paired with features like the Invisible Insect Screen, which keeps the view clear and the bugs out, our designs make homes smarter, more comfortable, and easier to enjoy every day. Innovation isn’t just part of what we do. It’s part of who we are
Quality You Can Rely On
Quality isn’t something we check at the end; it’s built into every step. At TOSTEM, everything is controlled under one roof from material selection and casting to surface treatment, fabrication, and final assembly. This vertical integration ensures consistent quality and complete attention to detail.
With trusted Japanese quality at the heart of our process, each product goes through over 100 strict performance tests to guarantee durability and reliability. Backed by over a century of engineering experience and certified to international standards (JIS/ASTM), TOSTEM delivers peace of mind that lasts.
Environment Shapes the Way We Build
We believe creating better homes should never come at the cost of the environment. That’s why sustainability is a key part of everything we do from energy-efficient product designs to ISO-certified manufacturing focused on minimizing environmental impact.
Our latest innovation, PremiAL R100, reflects this commitment. Designed with beauty, durability, and sustainability in mind, it uses 100% recycled aluminum to support a circular way of living without compromising on performance or aesthetics.
We’re on a journey toward Zero Carbon and Circular Living, driven by responsible innovation and smarter material choices. Because for us, building better means building with care.