<p><br>
Mr. Tsuboi Sunao would appear to be an ordinary healthy elderly Japanese man except for the large patch of white skin that medical specialists call leucoderma on his forehead. He is a cheerful 79 year old, but over the past 60 years he has been critically ill four times, each time being told that he would not survive. He first fell ill immediately after the bombing of Hiroshima when he was unconscious for 40 days. He is presently suffering from prostate cancer. Despite his illness he