TOSTEM IN16 Interior Door and Japanese Design Philosophy

Japanese design philosophy goes beyond mere aesthetics. It is a way of life, where individuals seek harmony with their surroundings through simplicity, sophistication, and respect for the essence of every detail.

In a Japanese home, no detail is accidental. From the flexible division of space and the utilization of natural light to the seamless connection between the interior and the exterior landscape—everything is directed towards a balanced, tranquil, and profound living experience.

The TOSTEM IN16 Interior product line was developed based on these core values. IN16 is not just a system of interior doors and partitions; it is a solution that connects spaces, links emotions, and elevates the living experience in contemporary homes.

1. Flexible Space Division with IN16 Hanging Sliding Doors

Inspired by Fusuma – The Japanese art of “opening and closing” space.

Fusuma are traditional sliding doors made of wood and paper, used to subdivide or expand space according to daily needs. They symbolize flexible thinking in Japanese architecture: space is not fixed but changes with the rhythm of life.

The IN16 Hanging Sliding Door inherits this spirit in a modern design language. When privacy is needed, the door creates a clear boundary. When opened to both sides, the spaces connect seamlessly, allowing light and air to flow naturally throughout the room. This solution is particularly suitable for living-dining areas, home offices, or multi-functional spaces in modern apartments.

2. Bringing the spirit of Noren – Semi-private boundaries – into the home with IN16 Swing Doors

Noren are traditional Japanese fabric dividers hung at the entrances of restaurants, tea houses, or bathhouses. They do not completely close off a space but create a “soft boundary”: private enough yet still allowing air and emotions to circulate.

The IN16 Swing Door recreates the Noren spirit through minimalist design and harmonious proportions. The door does more than just open and close; it maintains a continuous flow between living areas. It is an ideal choice for bedrooms, offices, or spaces that require just enough separation, where privacy and connection coexist subtly.

3. IN16 Fixed Partitions and inspiration from Ofuro – Traditional Japanese meditative bath space

Ofuro is more than just a place to wash; it is a space for relaxation, rejuvenation, and mindfulness. The Ofuro culture emphasizes subtle separation between functional areas rather than rigid partitioning.

IN16 Fixed Partitions evoke this spirit by using glass materials selectively:

• Clear glass: For areas needing light and an open feel.

• Frosted glass: For spaces requiring privacy. This gentle division creates a luxurious and relaxing experience while maintaining visual connectivity throughout the entire space.

4. Applying the Tansu philosophy – Hidden storage – with IN16 Hanging Sliding Doors

Tansu is the traditional Japanese art of cabinetry, famous for its ability to optimize storage and cleverly “hide” belongings to keep the space tidy and serene.

With IN16 Hanging Sliding Doors, wardrobes, storage rooms, or dressing rooms can “disappear” into the wall. When closed, the space consists only of minimalist flat surfaces. When opened, everything is clearly organized and easily accessible. This solution is perfect for modern apartments where tidiness is not just a convenience but a part of life quality.

5. Creating “Ma” – The art of meaningful voids – with IN16 Fixed Partitions

Ma is a unique concept in Japanese culture, valuing “voids” or “empty space” as a vital design element that brings rhythm, balance, and emotional depth.

By combining IN16 Fixed Partitions with solid walls, architects can create semi-enclosed, semi-open zones: defining spaces clearly while maintaining lightness, airiness, and visual links. These voids are not forgotten spaces—they become places that nurture stillness, helping people experience space more slowly and fully.

IN16 – When the essence of Japanese design meets contemporary life

The TOSTEM IN16 Interior line is a testament to how timeless Japanese design values can be seamlessly applied to modern homes. Beyond mere space division, IN16 opens up delicate connections, creating a deeper living experience—where every movement and every void holds meaning.