日本武雄　OND桑拿

在日本的公共桑拿中，人們常赤裸並肩而坐，然而這樣的場域並未導向無邊界的親密感，反而孕育出一種獨特的「日本式親近」。本案延伸這份文化脈絡，以「向心式」為核心概念，量體由15公分厚的樓板構成、捨去樑體，使結構中不再有非垂直接合面，進而簡化施工過程。牆體姿態呼應森林中的樹木，以模組化比例離散組裝，輕盈劃出分界，同時維持開放性，適度的距離更引入自然光影渲染空間。整體結構向中心編排，藉此鼓勵來者共享與理解，而非強迫親近彼此，柔和地調節人與人之間的距離。

In a sauna, strangers sit nearly naked in close proximity, creating potential intimacy. Yet in Japan, public saunas haven't fostered this sense of community. By aligning with Japan's unique sense of closeness, we aim to create a sociopetal space, encouraging shared understanding without forced intimacy. ''Non-intrusive'' walls balance connection and separation; their verticality resonates with the forest, while their spacing draws nature in and modulates closeness among neighbors.

量體立面模擬樹木向上生長的姿態，蜿蜒上升的動線通往屋頂休憩區，亦呼應建築的整體形態。入口、冷水池，與屋頂的配置從0.25公尺逐漸升高至3.25公尺，形成從桑拿、冷水池到露天休憩空間的垂直編排。位於樹梢高度的屋頂供來者遠望森林，感受大自然氣息。

Trees grow endlessly upward, a concept reflected in the vertical exterior walls clustered around the sauna room. A spiraling path leads upward to a rooftop relaxation space, mirroring the building's form. The sauna entrance is at GL+250, the cold plunge deck at GL+1000, and the rooftop at GL+3250, so the transition from sauna to cold plunge to open air follows a vertical flow. Viewing the forest at treetop height allows one to share in its growth rhythm. An irregular polygonal floor plan guides sightlines, creating varied scenic views. Research shows conversations are twice as frequent at 90 degrees versus side-by-side. Here, strangers sit together, so we chose obtuse-angled benches to balance interaction and privacy, encouraging conversation without intrusion. Varied seating allows for different levels of interaction, while the overall arrangement around a fire fosters a shared experience.

不規則的多邊形平面開拓視線所及之處，創造多樣的景觀視角。而桑拿室特有的90度鈍角座位設計，則促進對話的發生，於互動與隱私之間取得細膩平衡。圍繞火源展開的布局，亦讓空間於光與熱的交融中，凝聚出柔軟而溫暖的共享氛圍。

The irregular plan was chosen to allow the passage and expansion of the line of sight and to adjust the degree of intimacy, which was rationally solved by the 150mm CLT floor slab. The elimination of beams has eliminated non-perpendicular joints in the structure, contributing to labor savings in site work. The rational walls of the scale module are discretely assembled and the CLT slab connects them. This structural form itself can be described as a sociopetal structure.

主要建築師：下川太郎

結構工程：黑岩結構設計事務所

施工單位：旭I&R建設株式會社

建築面積：34.52平方公尺

主要材料：日本柏木．日本杉木．阿巴奇木

主要結構：傳統木構造．CLT結構

座落位置：日本佐賀縣武雄市

影像：川邊明延（helicon）、宮本和義（fusion graphic）

文字：AMANE ARCHITECTS   

採訪：張薰云

核稿：陳宗瑩