Jonouchi

People

• Kunio Jōnouchi, a Japanese professional baseball player for the Yomiuri Giants and Chiba Lotte Marines
• Missa Johnouchi, a Japanese composer, pianist, conductor, and singer
• Sanae Jōnouchi, a former member of the Japanese pop music group Onyanko Club

  Fictional people

• Ayame Jounouchi of Ouran High School Host Club
• Katsuya Jonouchi of Yu-Gi-Oh!
• Sai Jounouchi of Angelic Layer