The lighthouse-keeper operates the lone lighthouse on the island of Uta-jima. A quiet and thoughtful man who is deeply dedicated to his wife and his daughter, Chiyoko, he has a curious and tender soul and he takes his work very seriously. The lighthouse-keeper finds great purpose in his job, and, toward the end of the novel, as he gives the young lovers Shinji and Hatsue a tour of the watchtower and the beacon, he helps them to see that just as the lighthouse provides a light in the darkness for the island itself, so too can love and devotion provide a warm and guiding light in the darkness of life.