Kaoru Hanayama is a prominent character in the manga and anime series 'Baki the Grappler.' He is known for his immense physical strength and durability, often portrayed as one of the toughest opponents in underground fighting arenas. Hanayama is the leader of the Yakuza group in his region, and his commitment to honor and loyalty defines his character. Despite his fierce exterior, he exhibits a strong sense of respect towards worthy opponents. His role in the series often highlights themes of raw power versus refined martial arts skill.