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Appreciation towards PAN- PROJECTS for providing the following description:

Earthboat Cave是一座静静嵌入白桦湖畔森林中的小型木结构住宿单元。项目源自Earthboat的“自然逃离”理念——让人们从高密度的城市生活中抽离，在宁静的环境中重新与自然建立连接。

Earthboat Cave is a small timber accommodation quietly embedded in the lakeside forest of Shirakabako. The project was developed under the concept of “nature escape,” an Earthboat’s philosophy that allows people to escape dense urban life and reconnect with nature in a calm environment.

▼森林中的小型木结构住宿单元，a small timber accommodation quietly embedded in the lakeside forest © Yuta Sawamura Photography

建筑完全由日本杉木交叉层压木构筑，材料自身的温润与厚重感在结构中得到直接表达。室内表面均保持裸露，使杉木能够自然老化、记录时间的痕迹。小屋采用免基础安装方式，轻巧地触碰地面，不破坏下方的自然地形，并在必要时可轻松迁移。

▼结构轴测图，structure axonometric © PAN- PROJECTS

Constructed entirely from Japanese cedar cross-laminated timber (CLT), the structure expresses warmth and solidity through the material. The interior surfaces are left exposed, allowing the cedar to age naturally and register the passing of time. Installed without foundations, the cabin touches the ground lightly, preserving the landscape beneath it and allowing easy relocation if needed.

▼杉木交叉层压木立面，facade composed with Japanese cedar cross-laminated timber © Yuta Sawamura Photography

▼立面局部，facade detail © Yuta Sawamura Photography

设计以“户外生活”为核心。与其鼓励人们停留在封闭的庇护之中，小屋更支持一种向外延展的生活方式。一个可从户外直接进入的小型桑拿房在山间寒意中提供温暖，而周围的台阶、壁炉则构成聚会与休憩的户外场所。建筑在此作为一处安静的锚点，提供足够的舒适与安全感，使人们愿意在自然中久留。

The design was conceived around the idea of outdoor living. Rather than encouraging staying in an enclosed shelter, the cabin supports life that unfolds outside. A small sauna, directly accessible from the open air, offers warmth against the mountain chill, while the surrounding steps and fireplaces create places to gather and rest outdoors. The building serves as a quiet anchor, providing the comfort and security necessary to stay longer in nature.

▼聚会与休憩的户外场所，create places to gather and rest outdoors © Yuta Sawamura Photography

▼在山间寒意中提供温暖，offers warmth against the mountain chill © Yuta Sawamura Photography

室内氛围平静而富有触感。主窗框取景于湖面最美的角度，将室内体验延伸为户外风景。布局保持简洁：烹饪、休憩、观景——恰到好处的生活尺度。多处开口引入自然光，随着一天中的时序与天气的细微变化不断转变色调，映射出外部环境的脉动。

Inside, the atmosphere is calm and tactile. The main window frames the lake at its most scenic point, turning the interior experience into an extension of the outdoors. The layout remains simple: a place to cook, rest, and observe. The interior is designed to be an extension of the outdoor experience, light enters through multiple openings, shifting in tone throughout the day and reflecting the subtle changes in weather.

▼主窗框取景于湖面，The main window frames the lake © Yuta Sawamura Photography

▼烹饪空间，cooking space © Yuta Sawamura Photography

▼集烹饪、休憩、观景于一体，a place to cook, rest, and observe © Yuta Sawamura Photography

▼细部，detail © Yuta Sawamura Photography

建筑的气质是克制与宁静的。它并不在景观中主动表达存在，而是谦逊地坐落在林木之间，让自然成为主角。从桑拿到户外生活区，每个元素都旨在提升人们对周遭环境的感知，提醒访客重新体会自然的节奏。

The architecture’s quiet character defines its presence. It does not assert itself within the landscape but sits modestly among the trees, allowing nature to remain the dominant experience. Every element, from the sauna to the outdoor living area, is designed to enhance sensitivity toward the surroundings and to remind visitors of the rhythm of the natural world.

▼提升人们对周遭环境的感知，enhance sensitivity toward the surroundings © Yuta Sawamura Photography

▼卫生间，toilet © Yuta Sawamura Photography

Earthboat Cave延续了Earthboat系列的探索方向——研究小型、可移动的CLT结构如何在日本的多样景观中创造新的待客方式。每一个单元都与其场所环境相契合，同时共享“自然逃离”的核心理念，为旅人提供在风景中慢下来、静静倾听自然韵律的片刻。

Earthboat Cave continues the Earthboat series, which explores how small, mobile CLT structures can foster new ways of hospitality within Japan’s landscapes. Each is settled to its environment while sharing the same ethos of nature escape, offering moments to slow down and feel the quiet rhythms within the landscape.

▼修建过程，construction © PAN- PROJECTS

▼平面图，plan © PAN- PROJECTS

▼剖面图，section © PAN- PROJECTS

Completion Date: October 2025
Project Location: Shirakaba-ko, Nagano, Japan
Area: 25.6m2
Function: Mobile Cabin, Hotel
Status: Built
Primary Material: Japanese Cedar CLT (Cross Laminated Timber)
Design Firm: PAN- PROJECTS
Website: http://www.pan-projects.com/
Contact e-mail: press@pan-projects.com
Structural engineer: ARSTR
Website: http://www.arstr.jp/work
Photo Credit
Photo Credit 1: Yuta Sawamura Photography
Website:https://www.yuta-sawamura.com/
Photo Credit 2: PAN- PROJECTS
Client: Earthboat
Website: https://earthboat.jp/
CLT Supplier: Cypress Sunadaya
Website: http://www.sunadaya.co.jp/
Timber Consultant: SHINMIRAI INC.
Website:https://shin-mirai.co.jp/

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