Amakusa City is Located in Kumamoto Prefecture Japan on the Island of Kyushu.
Unusually for Japan, there is no train station in Amakusa city, and thus the private car has become the major form of transportation here. This Project attempts to provide a building which opens up to the public much like a “Station”, providing multi-functional public space that can be accessed freely by everyone.
▼建筑外观，exterior view ©Takumi Ota
▼平面图，plan ©NIKKEN SEKKEI
The building is named “KOKORASU”, which is a combination of Japanese worlds: KOKO+KORASU+SU. KOKO means “here”, KORASU means “come in” Local Amakusa dialect and SU means “nest”. The building houses a public library, a public health center and a public hall. All of these facilities face a courtyard which provides a comfortable green outdoor space, positioned such that any of the activities of these public facilities can easily spill out into the courtyard spaces.Part of the courtyard landscape is gradually elevated, connecting it with public library on the 2nd floor. Our design intention was to create very interesting experiences and interactions among users of the various public facilities through the placement of the curved shaped building surrounding the courtyard space.
▼弧线形建筑围绕着高低错落的庭院，the curved shaped building was placed surrounding the courtyard space ©Takumi Ota
▼鸟瞰，aerial view ©Takumi Ota
▼坡屋顶实现大跨度的开放空间，the slope roof creates large span, column free spaces for its interior functions ©Takumi Ota
The building’s roof, created by the combination of four dynamically curved surfaces with different slopes, is supported by a frame made from local timber for which Amakusa is well known. Where the curved roof planes overlap, pleasant daylight from the north enters together with fresh air from the mountainside. The roof structure also creates large span, column free spaces for its interior functions.
▼光照分析，lighting analysis ©NIKKEN SEKKEI
As a result, an open, public “Station” was born, welcoming everyone to experience and create their own story and experience at “KOKORASU”.
▼大楼梯，the grand staircase ©Takumi Ota
▼从庭院望向建筑，view to the building from the courtyard ©Takumi Ota
▼剖面透视图，sectional perspective ©NIKKEN SEKKEI
People relax gathering under the big roof, to enjoy various kinds of activities. The shape of the roof has become the trademark of this building, and for the design of the brandmark logo for this new facility we took inspiration from its unique form.
▼大屋顶下的开阔空间，the open plan space under the huge roof ©Takumi Ota
For the logo design, we also put the department and facility names under the outline of roof shape, symbolic of the various groups of people and various activities that occur under this big roof. The logo design closely relates to its architectural identity, and evokes a strong impression of one’s experience here, making it very easily remembered. Amakusa local pottery material is used to create the signage system for this new facility. Among its various forms it sometimes takes the shape of a stone, further enhancing the sense of nature of the courtyard to the interior spaces.
▼楼梯基座，staircase foundation ©Takumi Ota
▼图书馆，library ©Takumi Ota
For the furniture design, we also took care to highlight the existence of the outdoor space. The design of the book shelves, for example, creates strong, dynamic horizontal lines flowing inside the interior spaces, and they are limited in height so as not to block visual contact between the library and the surrounding natural environment.
Furniture is placed at the large open windows facing the courtyard, so people can be more relaxed while reading and can enjoy the natural atmosphere of the courtyard.
▼书架设计，book shelves ©Takumi Ota
▼阅读区视野，view from the reading area ©Takumi Ota
▼室内夜景，interior night view ©Takumi Ota
▼户外露台夜景，outdoor terrace night view ©Takumi Ota
Wataru Tanaka / NIKKEN SEKKEI
Project Name：Amakusa Complex “KOKORASU”
Design Team：Shinji Kaneuchi, Wataru Tanaka
Location：Amakusa City, Kumamoto, Japan
Function：Library、Health & Welfare Center、Community Center
Total Floor Area：5,452.87㎡
Floor：2 floor above ground
Design & Supervision：NIKKEN SEKKEI＋TAKT PROJECT
Photo Credit：Takumi Ota