Archive
2008.04.01
Series | Manufacturing Perspective No. 17
The significance of restoration beyond economic rationality
Mitsuo Iwai
As the first step in the second stage of the reconstruction of Tokyo's Marunouchi district, construction is underway on a site of approximately 12,000 square meters, including the construction of the new Marunouchi Park Building (an office and commercial building with four basement floors and 34 aboveground floors) and the restoration of the Mitsubishi Ichigokan (an art museum with one basement floor and three aboveground floors). Construction of the high-rise building's steel frame, which began in mid-January this year, is scheduled to be completed at the end of July using the overwhelming mechanical power of four 900-tonne tower cranes. The entire high-rise building, with a maximum height of 173 meters, will take just 27 months to complete. Meanwhile, brickwork for Mitsubishi Ichigokan, which began in mid-December last year, is scheduled to be completed by mid-July, with the third floor walls completed and the building completed in April of next year. The simultaneous use of these new and old construction methods is fascinating.
Mitsubishi Ichigokan was designed by Josiah Conder, a British architect who came to Japan in 1877 and left a legacy of modern architecture. Construction began in January 1892 and took 36 months to complete in December 1894. It was Marunouchi's first office building, featuring a Queen Anne style tenement house floor plan, typical of the British Victorian era. Its foundations were built on pine piles, its structure was earthquake-resistant brickwork reinforced with steel bands, and its roof was Western-style wooden trussed with queen post trusses and finished with domestically produced slate. Due to the demands of the times, the building was demolished in 1968. This latest restoration, however, has revealed a detailed picture of its original appearance through the examination of original blueprints and documents, as well as surveys of demolition drawings and preserved materials. The restoration requires a total of 2.28 million bricks, including 2.08 million structural bricks and 200,000 decorative bricks. Approximately 120 craftsmen, including bricklayers, stonemasons, and scaffolders, are currently working on the project each day. Aside from the use of cranes to transport the heavy exterior stonework, all work is done by hand. The sight of the craftsmen closely packed into the small construction site, laying bricks and stones, evokes a time when, under Conder's guidance, Japanese architects and craftsmen, including his apprentice, Tatsuzo Sone, attempted Western architecture. It also highlights the legacy of the bricklayers' spirit and skills, passed down for over a century. While the craftsmen's discerning eyes ensure high precision and finish, the brick walls, crafted entirely by hand, have a unique texture that conveys the warmth of human hands. Unfortunately, however, it's unlikely that Japan will ever see another fully brick-built building like this again in the future.
Meanwhile, construction on the high-rise building is underway with around 1,000 workers a day. As of April 15, construction of the steel frame has progressed up to the 23rd floor above ground, but there are virtually no people in the massive volume, with the only visible sight being a gigantic tower crane slowly lifting materials. Over a hundred years have passed since Western architecture was introduced to Japan, and construction has been industrialized at a considerable speed, resulting in standardized construction precision and finish and shortened construction times. The driving force behind this is the wide variety of construction machinery, which, thanks to advances in IT technology, has been robotized to carry out more complex and advanced tasks, with progress showing no signs of slowing down.
As in many other production sites, it may be economically rational for machines to replace the long-cultivated human handiwork at construction sites, but when it comes to "manufacturing" techniques that are a culture that symbolizes the era of civilization and enlightenment, such as the skills of bricklayers, surely there needs to be a system to pass on the skills of artisans. We hope that the restored Mitsubishi Ichigokan will survive for hundreds of years to come, and will become a building that goes beyond economic rationality and is able to convey the heart and skill of the people who built it.
Profile
Former Representative Director, Deputy President Mitsubishi Jisho Design Inc.
Mitsuo Iwai
Mitsuo Iwai
Update : 2008.04.01