My research on the wild chimpanzees of Mahale started 45 years ago. I have spent only 12 years in Africa, but almost always I have been preoccupied with the chimpanzees of Mahale, even when in Japan. I have absolutely no regrets about dedicating my whole professional life to research on chimpanzees. The chimpanzees are really worth the time we have spent together, and they are new to me each time I visit Mahale.

In pursuing my work, I have lived in one of the world’s most remote places, where people continue to lead a traditional village life. My cottage was more humble than most households, without any of civilisation’s amenities, such as electricity, plumbing, gas, newspaper, or telephone. I enjoyed the company of cheerful people, a green forest, wild animals, fresh air, clean natural water, and additive-free food, including fresh lake fish, delicious chicken, and vegetables.