The author have been engaged in medical consul-tant work with leprosy patients in the field of otorhino-laryngology at the National Leprosarium Tama Zensho-En for five years since 1938, and on the other hand he had many opportunities to con-duct autopsies which helped him in pursuing clinic-al and pathological researches on the upper re-spiratory tract, particularly, from a point of otorhinolaryngological view.
The author wanted to conclude his five years re-search in a book under the title "Leprosy of the upper respiratory tract", but the book was not published unfortunately as being burnt in air raids during the press in 1945.
The postwar appearance of PROMIN and DDS discouraged the author from republishing his work. However, in 1981, the author began to think that the clinical pictures of leprosy lesions in the nose, pharynx and larynx which were painted at the time of Chaulmoogra oil had a scarcity value in litera-ture on the subject and this had led to a decision to republish the book "Leprosy of the upper respira-tory tract-Atlas of Clinical Picture and Notes on the Research (1938-'43)".
