白井屋酒店（SHIROIYA Hotel）位于日本群马县前桥市中心，是由一座废弃建筑改造而来。建筑原先属于一家老字号旅馆，大约于40年前搬迁至此处。项目旨在帮助整个市中心重新焕发活力，其主要任务分为两个部分，一是对既有的4层钢筋混凝土主体建筑进行改造，二是在场地内打造一栋新的建筑。在完工后，两座建筑分别作为“传统楼”（Heritage Tower）和“绿塔”（Green Tower）向客人开放。
The project was to rejuvenate a defunct building in the centre of Maebashi City, Gunma Prefecture. Formerly belonging to a long-established inn, the work was intended to assist in regeneration of the whole city centre. Our brief was to renovate the four-storey reinforced concrete main building into which the inn had moved some 40 years ago. This would be called the Heritage Tower. The second task was to construct of a new building, to be called the Green Tower.
▼“绿塔”外观（Green Tower） © Katsumasa Tanaka
▼“传统楼”外观（Heritage Tower） © Katsumasa Tanaka
The Shiroiya Ryokan (inn) had been in operation for over 300 years, since the Edo Period, but it sadly had to close, leaving the building vacant. The rejuvenation project began when Jin Tanaka, President of the JINS Eyewear Company and himself from Maebashi, purchased the derelict structure with the hope of using it to revitalise the whole hollowed-out centre of Maebashi, called the machi-naka area.
▼新建的“绿塔”灵感源自利根川旧时的河岸 © Katsumasa Tanaka
Green Tower is a new building inspired by the former river bank of Tonegawa
We visited the site at the earliest opportunity, and found a banal four-storey RC structure. We felt that something drastic was needed to realise any potentiality, and at the start of the design process, we decided to dismantle the walls and floors across all four storeys to create a gigantic central atrium. This initial idea inspired the ensuing design concepts.
▼中庭入口，entry way © Daici Ano + Tomoyuki Kusunose
▼通高的中庭空间，the full-height atrium © Daici Ano + Tomoyuki Kusunose
▼城市客厅，the “urban living room” © Katsumasa Tanaka
▼旋转楼梯，the spiral staircase © Daici Ano + Tomoyuki Kusunose
▼细节，detailed view © Daici Ano
A lounge space in the atrium’s ground level serves as a ‘living room for the city’. It is continuous with the street outside, inviting people in, as a place for all kinds of people to meet and gather. The huge cavity, with its powerful concrete columns and exposed beams, is filled with the natural rays from upper-level skylights. It is a city-scale internal piazza where diverse elements coexist, such as artworks, plants, furniture, curtains and staircases.
▼传统楼内的“城市客厅”囊括了众多艺术作品，其中包括Leandro Erlich的“灯管” © Katsumasa Tanaka
The atrium of the four-story Heritage Tower houses numerous artworks, including the fantastical “Lighting Pipes” by Leandro Erlich
▼休闲吧台，the bar © Katsumasa Tanaka
▼接待台后方悬挂着Hiroshi Sugimoto的摄影作品 © Katsumasa Tanaka
A Hiroshi Sugimoto photograph behind the reception desk. Photo: Katsumasa Tanaka
When a visitor climbs the stairs, they perceive spatial changes, stretching and reducing in depth and overlapping in all directions, as their sight-lines and body-direction alter along the route. This replicates the experience of moving through an actual city. The seamless three-dimensionality continues right up to the top of the atrium. This vertical cavity forms a 3D urban district of streets, which continue on from outdoor pathways. At the same time, the atrium is a piazza, or ‘room belonging to the city’, for diverse objects, people and activities.
▼垂直的空腔构成了立体的城市领域，The vertical cavity forms a 3D urban district of streets © Katsumasa Tanaka
▼混凝土立柱和裸露的横梁纵横交错，顶部天窗引入大量的自然光线 © Katsumasa Tanaka
The huge cavity, with its powerful concrete columns and exposed beams, is filled with the natural rays from upper-level skylights
The new building is adjacent to the old one. Its location was formerly a terrace over a tributary of Tone River, and the two sites have a height difference equivalent to one storey. Originally, the main building had a public footpath traversing its site from the main road at the front, to Babakkawa-dori street in the back. We therefore proposed a green bank to function as similarly, running from the main road to the rear street, which would also compensate for the height-difference. We created a raised bank to offer a new urban space and to be a three-dimensional extension of the existing route. It is also a spatial expansion of the sidewalk, and is surrounded by curved surfaces. This bank is coupled with the main building on the concept of oppositions, such as new/old, outside/inside and urban/architectural.
The green bank is raised and surrounded by curved surfaces © Katsumasa Tanaka
Our client, Mr. Tanaka, is involved in numerous regeneration projects for Maebashi’s machi-naka, and the Shiroiya Hotel was not alone. While the new building was under design, in 2016, Mr. Tanaka and Maebashi City teamed up to research and analyse the principal features of the city, and they came up with the concept of of mebuku, or ‘sprouting’. This would be the keyword for visualising Maebashi City 100 years in the future. The undulating green hills of the new building resonate with the concept of mebuku, while also referring back to what Maebashi was like before it urbanised.
▼客房视野，view from the guest room © Katsumasa Tanaka
▼特色房间：Michele De Lucchi客房，Special Room: The Michele De Lucchi Room © Katsumasa Tanaka
▼特色房间：Jasper Morrison客房，Special Room: The Jasper Morrison Room © Katsumasa Tanaka
▼传统楼客房，Heritage Tower room © Daici Ano + Tomoyuki Kusunose
▼楼梯，stairs © Katsumasa Tanaka
As work at the Shiroiya progressed, Maebashi City underwent gradual change, which became symbiotic with the project. Several artists, designers and city residents participated to support Mr. Tanaka’s vision, and the Shiroiya project embraced diversity through collaboration with those individuals and groups. We hope this new space, born from a mixture of city, architecture and landscape, will contribute to the remaking of a future city, growing and resonating throughout Maebashi City.
▼夜晚的城市客厅，the living room by night © Katsumasa Tanaka
▼白井屋酒店，绿塔，SHIROIYA Hotel Green Tower © Daici Ano + Tomoyuki Kusunose
Overall Architecture & Design: Sou Fujimoto
Guest Room Design: Michele De Lucchi, Jasper Morrison, Leandro Erlich, Sou Fujimoto
Lighting Design: Hiroyasu Shoji
Textile Design: Yoko Ando
Interior Coordination: Tomomi Nagayama
Digital Signage, Art Direction: nanilani
Restaurant Supervisor: Hiroyasu Kawate (Florilège)
Restaurant Design: Shinsuke Kai (Esquisse, inc.)
Planting Supervisor: Taichi Saito (Solso)