Premise: The Sound of Waves (潮騒 , Shiosai ) is a 1954 novel by the Japanese author Yukio Mishima. It is a coming-of-age story of the protagonist Shinji and his romance with Hatsue, the beautiful daughter of the wealthy ship owner Terukichi. For this book Mishima was awarded the Shincho Prize from Shinchosha Publishing in 1954. It has been adapted for film five times.
Hypothesis: Terukichi later went on to become Shinji's father in law.