28. May 2026

A minimum of space exploited to maximum effect

A family home in Kawaguchi, Japan demonstrates how a quality home interior with a spacious feel can be realized in the tightest of space

• An open feel on only around 40 square meters of floor space
• Precision planning by RIOTADESIGN featuring well-conceived walkways and multifunctional elements
• High-quality bathroom design featuring Duravit's DuraSquare and C. 1 ranges

Embedded in Kawaguchi's densely developed townscape, the "drop" house developed by RIOTADESIGN is a well-conceived solution addressing the challenges of restricted space: compact on the outside, but with a surprisingly spacious feel inside. Different levels, window seats, a high ceiling and a gallery blend together to form a cohesive spatial structure.

Social core

The living area forms the central core of the house, with a made-to-measure table serving as the social hub. Precision planning of the functions and the walkways between the different areas ensures efficient use of every square meter, without compromising on comfort. The eating area is integrated into a slightly lowered level, for example, the edge of which also serves as seating and opens up scope for other possible uses. High-quality materials, such as wood, plastered surfaces and textile elements, combine with a clear design to produce a homely interior accommodating the needs of daily use.

Meticulous attention to detail

In the bathroom, RIOTADESIGN has opted for durable quality by Duravit. The above-counter basin of the DuraSquare range combines delicate lines with a design which reduces splashing and enables convenient use. The absence of an overflow and an outlet detail in ceramic underpin the calm design. The basin combines with the C.1 faucet to produce a harmonious overall impression featuring a pleasant look and feel and reliable functionality in everyday use.

Infobox:

Architect: RIOTADESIGN
Year of construction: 2025
Location: Kawaguchi, Japan
Duravit ranges used: DuraSquare & C. 1

press pictures

Open living area: The transitions between the living, eating and cooking areas are fluid. Wood surfaces, the sloping ceiling and visible structural elements shape the atmosphere and make the interior seem larger. (Image source: Ippei Shinzawa)

Drop concept The name takes up the idea of the "lucky drop", suggesting that even the smallest remaining space may harbor unexpected potential. Materials, lighting design and clear structures translate this approach into a cohesive spatial composition. (Image source: Ippei Shinzawa)

Functional clarity: The kitchen is compactly organized and designed so as to have everything to hand and within easy reach. Integrated storage space, clearly structured surfaces and the use of different materials according to a logical, systematic approach provide for efficient and harmonious use. (Image source: Ippei Shinzawa)

Restrained lines: The bathroom area features a calm, minimalist design. With its clear geometry, the DuraSquare above-counter basin serves as a striking highlight on the wooden console while at the same time blending harmoniously into the overall appearance. (Image source: Ippei Shinzawa)