When Frank Lloyd Wright’s Imperial Hotel in Tokyo was demolished in 1967, a team of students led by Professor Shindo Akashi at Waseda University spent six months researching and preserving valuable records of the building. Their project was published as ‘Empirical Research on Former Imperial Hotel’ in 1972, but due to its limited circulation and high price, the book is now very difficult to obtain. With this new edition, the original contents have been re-edited for wider research. Because Wright made numerous modifications to his original drawings during the hotel’s construction, the materials included in this revised volume are only those which reflect what was actually built.