InterBEE REVIEW2012 (EN)

15/48

19We wanted to try our hand at an unexplored project.But "work was in progress" at the site….The red-bricked Tokyo station building was created by Kingo Tatsuno, who worked on many buildings such as the Bank of Japan’s head office. The station is a historical building built 98 years ago, but part of it was burned down in an air raid during the war, and it had been managed up to the 21st century with makeshift repairs.As a part of the station’s redevel-opment by the East Japan Railway Company, a project to restore the station building to its original form got underway.Upon discovering that the redevel-oped station building would open in October 2012, after many years of work, Mr. Moriuchi proposed a projection mapping event to the East Japan Railway Company to commemorate this event. This took place back in April 2011.“Because we were dealing with the restoration of an historic building, this was really the chance of a lifetime. I felt that projection mapping could be an interesting way to promote the regeneration and development of the station building.”Talks went smoothly and the work was scheduled to start at the end of September soon after station building restoration work was completed. This period was chosen because the building was due to open the following month and the Tokyo Station Hotel built inside the building was to open for business at that time. The light coming from the hotel windows would hamper the projection map. Therefore, the event took place in the short period just after the work finished and right before the building opened. However, there was one problem with this timing. Because the event was due to be held straight after completion of the building work, preparations had to be made while the work was ongoing. Projection mapping doesn’t simply mean installing a projector. Various complex problems have to be cleared such as where and how to install the dozens of projectors and then establish-ing images. At the site where the work was taking place, places to set up the projectors had to be explored and then the projectors had to be actually installed and tested. It was also neces-sary to explore places and viewpoints where the audience could see the most beautiful images. The building itself had not been completed, so it was not possible to focus closely on intricate images.The Technical Director, Mr. Uchida, said “We conducted tests when it was raining in July. The station building is a dark-red brick building, so we found that a lot of illuminance was needed for the projected images. We used a 35,000 lumen projector, but to be honest the effect was not what we wanted, so weren’t sure whether to go ahead or not.”They wanted to achieve 100 lux of illuminance on the project plane, but it was necessary to combine several projec-tors to achieve this. Also, due to spatial circumstances in the premises and the fact that projectors had to be located 77m from the project plane, it was necessary to calculate how many projectors were needed to get that illuminance and cover the entire station building.There were many hurdles that needed to be physically cleared such as the number of equipment that can project either in 16:9 or 4:3, and the number of projectors that could actually be secured.Eventually, the foundations were put in place by projecting images in ten sections of two rows and securing 46 20,000-lumen projectors.

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