Around 6000 holes puncture the concrete exterior of this library in Kanazawa, Japan, by Kazumi Kudo and Hiroshi Horiba of Japanese firm Coelacanth K&H Architects.

Translucent glass fills each hole, diffusing natural light into the 12 metre-high reading room of the Kanazawa Umimirai Library.

This primary reading room occupies the entire first floor, overlooked by a mezzanine containing informal reading areas and a craft corner.

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Photography is by Satoshi Asakawa.

The following information is from the architects:

Kanazawa Umimirai Library

A library for the future

Reading - for the sake of knowledge or enjoyment, or to explore the world of the human imagination - is one of those experiences that gives you a sense of emotional and spiritual richness quite different from economic or monetary well-being. In this sense, the act of creating a space that surrounds you with books is undoubtedly linked to the creation of a new, enriched sense of public values.

Libraries in Japan are moving towards a model that encourages readers to stay and linger, instead of their original function as spaces for collecting and lending out books. Reflecting the general trend for libraries to facilitate reading as well as other functions, this library uses compact automated shelves that operate as a closed stack system. This is combined with halls and meeting rooms that promote social exchange between its users, much like a community center. The facility is also expected to serve as a new hub for social life among the local community.

For a public library such as this, we thought that the most important thing to have would be a reading room that provides visitors with a pleasant, comfortable space to read. This environment would allow users to experience the joy of reading while surrounded by a treasure trove of books with a overwhelming physical presence, something that the convenience of electronic and digital books cannot offer. For this project, we proposed a simple space measuring 45m by 45m with a height of about 12m, enclosed by a "punching wall" and supported by 25 pillars that would function as a storehouse for books and a hub for human communication. This huge, massive volume served as a reading space in keeping with the mood and setting of a library.

What we wanted to do, in other words, was to design a certain "atmosphere" for books and reading. This library consists of a single quiet and tranquil room that resembles a forest, filled with soft light and a feeling of openness reminiscent of the outdoors. One successful example of such a space is the old Bibliotheque Nationale (National Library) in Paris designed by Henri Labrouste, a masterpiece that was built using the most advanced steel construction technologies of the 19th century.

The building represents a continuous relationship that brings books and humans together even as it changes and evolves, transcending time and history. This simple box-like form also contains within it a certain freedom, however: this is a space that permits a composite mix of various media that will continue to change and evolve against the backdrop of an information-centered age.

The overall structure of the library resembles an internal three-layered floor covered with a large box that we refer to as a "cake box". The large external "punching wall" in the cavernous reading room features some 6,000 small openings (measuring 200, 250 and 300mm) across its entire surface that allow a soft, uniform light to enter the building.

In addition, the burden of seismic force from any earthquakes is born across the entire expanse of this wall. A floor heating system that warms and cools the building under the floor has been installed in order to make this large space comfortable to inhabit, while large natural ventilation openings in the roof ensure a pleasant and comfortable indoor environment during the warmer months.

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Calibrated and calculated with the utmost precision, this beautiful "cake box" space will hopefully become a new symbol of the western part of Kanazawa, a city that continues to face rapid urbanization.

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Project Outline

Client: Kanazawa City

Location: Kanazawa city, Ishikawa Prefecture, Japan

Date of Completion: 2011.03

Principal Use: Library

Structure: Steel frame, reinforced concrete (partly)

Site Area: 11,763.43 m2

Building area: 2,311.91 m2

Total Floor Area: 5,641.90 m2 (469.06m2/B1F , 2,071.89m2/1F, 2,065.79m2/2F, 832.23m2/3F)

Design Period: 2008.08 - 09.06

Construction Period: 2009.09 - 11.03

Structural Engineer: Structural Design Office OAK

Mechanical Engineer: Electrical facilities: Sestubikeikaku Co.,Ltd.

Machinery facilities: Scientific Air-conditioning Institute

Supervision: Kazumi KUDO + Hiroshi HORIBA / Coelacanth K&H Architects

Interior Design: furniture: Fujie Kazuko Atelier, Lighting: Koizumi Lighting Technology Corp.

Landscape Design: Soichiro Tsukamoto Architecte de Paysages (Basic design)

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Material Information

Exterior Finish:

-Roof: Asphalt waterproofing with torch method, acrylic resin emulsion paint high gloss type

-Exterior wall: Glass-fiber reinforced cement, fluoropolymer coating, photocatalyst KBL coating on glass surface

-Window : Aluminum sash/ Steel sash/ Stainless sash

Exterior:

-Trees and plants: Zelkova, Quercus myrsinifolia, Ilex pedunculosa, Quereur phillyraeoides and others

-Pavement : Permeable concrete/ Asphalt

Floor: 6.5mm tile carpet/ 5mm rubber floor tile/ 15mm compound floorings maple

Wall: 3.2mm steel panel, 1.6mm synthetic resin base ready-mixed paint/ 9.5 + 12.5mm plaster board, Synthetic resin emulsion paint/ 6mm incombustible veneer

Ceiling : 12mm rock wool board/ 25mm 80kg/m3 glass wool