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Sanfrecce Hiroshima was Tadanari Lee's first professional club. He joined the Japanese club in 2004 after graduating from high school. Lee made his professional debut for Sanfrecce Hiroshima in the J1 League in 2005. He spent three seasons with the club, making 59 appearances and scoring 11 goals. In 2008, Lee transferred to Vegalta Sendai, another J1 League club.