Prolongment of buildings’ life is important because many buildings are getting old, and most of them are hard to rebuild. It is also important to preserve buildings which tell us many historical things. Yasuda-hall, at University of Tokyo, built in 1925 and went through WW2, campus disturbances, East Japan Disasters, and so on. In this study, we unveil records of Yasuda-hall’s repair and renovation. In this paper, we show the history of Yasuda-hall and the summary of Yasuda-hall’s records of repair and renovation.
