Hiroshi is Shinji’s younger brother. He is excitable, impetuous, and occasionally a bit greedy. He enjoys stirring up trouble so that he can temporarily get Shinji in trouble and become his mother’s favorite. Hiroshi is a restless spirit who finds his curiosity about the world expanded and deepened after a trip to the cities of Kyoto and Osaka with his classmates—yet in many ways, Hiroshi is deeply naïve. When rumors about Shinji and Hatsue sleeping together out of wedlock begin to spread and Hiroshi’s friends tease him, Hiroshi is confused by what the rumors are exactly about. He wants to be part of the world and participate in life outside of Uta-jima—but even by the end of the novel, he has a lot of growing up to do before he achieves the centered, calm selflessness that Mishima suggests marks someone’s entrance into adulthood.