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ONE SAPPORO STATION TOWER — Civic Thresholds for a Northern Climate

Design Skill Awards / 2026

Silver Winner2026
CATEGORY

Architecture

AWARDED NOMINATION

Best Residential Architecture

ONE SAPPORO STATION TOWER — Civic Thresholds for a Northern Climate

DESIGNED BY

Kotaro Horiuchi

KOTARO HORIUCHI Corp.
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ONE SAPPORO STATION TOWER — Civic Thresholds for a Northern Climate redefines the spaces beyond the private unit as architectural ground. Instead of treating them as amenities, corridors, waiting areas, or scenic rooms, the project gives them a name and structure: a vertical sequence of MA, where city, climate, material, body, and everyday life are reconnected before the front door. The submitted image sequence begins with the black threshold of arrival, then pulls back to the tower within Sapporo’s urban fabric before moving through light, depth, distance, shadow, sky, and hand-scale detail. This order is essential: the project is not a collection of designed rooms, but a continuous experience from city to dwelling. In Sapporo, snow, underground movement, station flow, parking arrival, and seasonal contrast are not background conditions. They are spatial forces. TSUGI NO MA receives them through black perforated aluminum, bamboo, moss, Sapporo soft stone, and dark mineral surfaces. Transit is slowed into a composed threshold where people, vehicles, and exterior conditions appear as fragments of light and shadow. YAWARA NO MA opens the sequence through diffusion. A white double-skin aluminum facade, double-height space, curved ceiling, timber, planting, and custom furniture soften the shift from city to daily life. Light passes through perforations, touches materials, reflects, and becomes depth. At the middle levels, EN NO MA, MA NO MA, and KI NO MA give form to distance. Mirrors, gradient translucency, movable furniture, veiled glass, planted tables, timber partitions, perforated screens, green carpet, and quiet plaster surfaces allow overlap, privacy, solitude, and the presence of others to coexist. At the upper levels, KAGE NO MA and SORA NO MA turn the sequence toward shadow and sky. Dark plaster, low light, curved ceilings, tables, counters, layered chairs, and panoramic edges make dining, conversation, silence, and looking outward part of one atmosphere. The view is not consumed as an image; it becomes a place the body can inhabit. Across every MA, one spatial language continues: Bezier curves, perforations, custom furniture, handles, screens, counters, timber elements, mineral surfaces, and living materials. The same design logic moves from the urban facade to details touched by the hand. Materials are not finishes. Recycled aluminum filters light and sight. Sapporo soft stone carries local memory. Timber softens sound and touch. Plaster gives shadow depth. Planting brings time and life into dense urban conditions. The achievement is the invention of a vertical landscape of thresholds. In many towers, areas outside the private unit remain residual: places to pass, wait, serve a function, or consume a view. Here, they become architectural ground where city and dwelling meet. ONE SAPPORO shows that housing begins before the front door, in thresholds where people, nature, climate, and one another are brought into relation.

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THE PEOPLE BEHIND THE PROJECT

KOTARO HORIUCHI Corp.

KOTARO HORIUCHI Corp. is an architecture and spatial design practice founded in Paris in 2005 by architect Kotaro Horiuchi. Working from Tokyo, Paris and Ishigaki Island, the practice designs architecture not as a fixed object, but as a living relationship between people, nature, city and culture. Its work moves across architecture, interiors, furniture, products, landscape and project management, treating light, material, craft, climate and human behaviour as one continuous environment. From urban towers to island landscapes, the studio transforms thresholds, details and atmospheres into lasting value for contemporary life. Its long-running research on perforation explores how openings, light, shadow and transparency can reconnect inside and outside, object and body, visibility and concealment. The practice has developed projects internationally and received recognition including ADC Awards Gold Winner for ANA Glass and The Houzee Awards Platinum Winner for ONE SAPPORO STATION TOWER.

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