Architecture and interiors for the way you live.

Ostra is a Tokyo-based architecture and interior design studio. We create homes and spaces shaped by the people who use them, the character of each site, and the quiet qualities of light and material. From the first sketch to the details you touch every day, we bring clarity and care to the way a space is planned, made, and lived in.

Ostra is a Tokyo-based architecture and interior design studio. We create homes and spaces shaped by the people who use them, the character of each site, and the quiet qualities of light and material. From the first sketch to the details you touch every day, we bring clarity and care to the way a space is planned, made, and lived in.

Thoughtful spaces. A lasting connection to place.

(OUR STUDIO)

Ostra brings architecture and interiors into one conversation. We begin by listening: how you live, what matters to you, and what your site makes possible. We then develop the plan, material palette, and details together, so each decision supports the next. Working closely with clients, consultants, and makers, we shape spaces that feel personal, practical, and connected to place.

Ostra brings architecture and interiors into one conversation. We begin by listening: how you live, what matters to you, and what your site makes possible. We then develop the plan, material palette, and details together, so each decision supports the next. Working closely with clients, consultants, and makers, we shape spaces that feel personal, practical, and connected to place.

(DESIGN APPROACH)

Our approach starts with orientation, natural light, and the flow of daily life. We consider the relationship between rooms, the value of a garden outlook, and the moments where privacy matters. Materials are chosen for how they feel, how they work, and how they age. The result is a clear, connected design with room for the everyday.

Our approach starts with orientation, natural light, and the flow of daily life. We consider the relationship between rooms, the value of a garden outlook, and the moments where privacy matters. Materials are chosen for how they feel, how they work, and how they age. The result is a clear, connected design with room for the everyday.

The studio team gathered in a timber interior

THE PEOPLE
BEHIND YOUR SPACES

Ren Nakamura

Founder & Principal Architect

Yuna Takahashi

Senior Interior Designer

Hana Mori

Design Director

Kai Fujimoto

Lead Architect

Mika Hayashi

Interior Stylist & Design Consultant

Starting at card 1 of 5

(OUR PRACTICE)

We consider architecture and interiors together, so the plan, materials, and details work as one.

From the first conversation to the final selections, we keep the design connected to your brief. Each decision is weighed against how the space will be used, how it will feel, and how it will change over time.

Our work ranges from new homes and renovations to interiors and spaces for gathering. The common thread is a careful response to people and place.

a white building with a lot of windows on it

(SERVICES)

Residential architecture

Homes shaped by orientation, privacy, and the flow of daily life.

Interior design

Materials, lighting, and joinery considered as part of one connected design.

Renovations & extensions

Thoughtful changes that connect existing character with new ways of living.

Furniture & styling

Furniture, textiles, and objects that bring warmth and continuity to a room.