Space

The PolyCuboid

Extra Form

Area	Japan
Year	2025
Award	GOLD WINNER
Client	TIA Co., Ltd.
Affiliation	KTX archiLAB Co., Ltd.
Designer	Tetsuya Matsumoto
Description(English)	The PolyCuboid is the new headquarters building for TIA, a company that provides insurance services. The first floor was shaped by the limits of the site and the ø700mm water pipe that is crossing the site underground limiting foundation space. The metallic structure dissolves into the diverse blocks of the composition. The pillars and beams vanish from the space syntax, projecting the impression of an object, while also eliminating that of a building. The volumetric design is inspired by TIA’s Logo turning the building itself into an icon representing the company.
Description(Native)	PolyCuboidは、保険サービスを提供するTIAの新本社ビルで、3つの直方体が交差・重なり合う構成により、多様な空間や機能を内包しています。内外のテラスや吹き抜け、橋による動線など、立体的で豊かな空間構成が特徴です。敷地内を横切る直径700mmの水道管により基礎面積が制限され、1階はその条件に合わせて設計されました。2〜3階の中央ボリュームは両側に張り出し、延床面積を拡張。1階は受付や執務スペース、2階は会議室や社長室、休憩スペースがあり、3・4階はトレーニングルームや食堂、ピアノスペースなどリクリエーション機能が集約されています。建物の構造体は視覚的に空間に溶け込み、柱や梁を感じさせないデザインで、建築というより「オブジェ」としての印象を与えます。全体の造形はTIAのロゴをモチーフにしており、建物そのものが企業のアイコンとなることを意図しています。
Website	ktx.space
Positive Comments
Judging Comments	The PolyCuboid serves as the new headquarters for TIA, transforming site constraints—including an underground water pipe—into a distinctive architectural statement. Its metallic structure dissolves into a composition of diverse blocks, removing visible pillars and beams to create the impression of an object rather than a conventional building. Inspired by TIA’s logo, the volumetric design turns the headquarters into a bold icon that embodies the company’s identity. The jury valued how the project transforms functional and structural challenges into a striking brand symbol with architectural clarity.

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