James Yoshinobu Iha (伊葉吉伸, Iha Yoshinobu) is an American rock musician. He is best known as a guitarist and co-founder of the alternative rock band the Smashing Pumpkins. He was a member until the initial breakup in 2000. Among his musical projects of recent years, Iha has been a permanent fixture of A Perfect Circle. He rejoined the Smashing Pumpkins in 2018.