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Júbilo Iwata was the club where Toshihiro Hattori spent the majority of his professional career. He played for the Japanese club from 1994 to 2006, making over 300 appearances and winning several major titles, including the J1 League championship and the Emperor's Cup. Hattori was a key player for Júbilo Iwata during their most successful period, and he is considered one of the club's greatest players.