Hiroshi Koshikawa (越川ひろし, "Koshikawa Hiroshi", April 22, 1946 {age 75}; - ) is a Japanese musician and lead guitarist. He is known as the band leader of The Carnabeats. His two nicknames was Hiro-chan (ヒロちゃん, "Hirochan") and Frog (カエル, "Kaeru").