The 2017 J1 League (known as the 2017 Meiji Yasuda J1 League (2017 明治安田生命J1リーグ) for sponsorship reasons) was the 25th season of the J1 League, the top Japanese professional league for association football clubs, since its establishment in 1993. The season began on 25 February 2017 and ended on 2 December. Fixtures for the 2017 season were announced on 26 January 2017. Kashima Antlers were the defending champions. Consadole Sapporo, Shimizu S-Pulse and Cerezo Osaka entered as the three promoted teams from the 2016 J2 League.