[KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - COVER IMG] Photo by Tololo studio Mayu Nakamura
[KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 1] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 2] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 3] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 4] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 5] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 6] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 7] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 8] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 9] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 10] [KEY OPERATION INC./ARCHITECTS - Transom Garden Building at Naka-Ikebukuro Park - IMG 11]

Transom Garden Building at Naka-Ikebukuro Park

Firm LocationTokyo, Japan
Project locationToshima-ku, Tokyo
CompanyKEY OPERATION INC./ARCHITECTS
Lead ArchitectAkira Koyama
ClientConfidential
Projecthttps://www.keyoperation.com/en/archives/projects/small-building-in-nakaikebukuro-park/
Project Videohttps://www.youtube.com/watch?v=0AKHKmQyM1c

Located beside the renewed Naka-Ikebukuro Park, this mixed-use building integrates commercial spaces and a maisonette residence within a compact urban footprint. In response to the stone-paved plaza and its vibrant public life, the project introduces a “transom garden” — a planted band inserted at the upper window level. This sectional greenery preserves tenant visibility while filtering light and softening the façade. Recessed garden zones create depth and environmental continuity with the park, proposing a porous urban form that mediates between city, plaza, and interior life.