2006, Osim left the club to take over the coach of the Japan national team and was succeeded by Amar Osim, his son and assistant coach. On December 5, 2007, it was announced that Amar Osim had been sacked after the club's lowly 13th-place finish in the 2007 season. After 13 games in the 2008 season Josip Kuže was sacked as team manager. On 8 May 2008 it was announced that the new manager was Alex Miller. Miller was First Team Coach at Liverpool F.C. alongside Rafael Benítez prior to joining JEF United. The Furukawa Electric is no longer the main sponsor of the club, a job these days taken over by Fuji Electric. On November 8, 2009, JEF United Chiba was relegated to J2 after 44 seasons in the Japanese top division; since 2010, JEF United Chiba is playing in J.League Division 2. JEF United Chiba was close to being promoted to J.League Division 1 during the 2012 season. The club was considered one of the favorites to be directly promoted to J1. However, after defeats to clubs considered lesser than them such as FC Gifu and F.C. Machida Zelvia, JEF played the playoffs, making their road to the final. They defeated Yokohama FC by 4–0, but lost the final match to Oita Trinita by 1–0, at Tokyo National Stadium. In the 2013 season they played in the promotion to J1 playoffs. They lost the semi final match to Tokushima Vortis by 1–1(Chiba was 6th place and Tokushima was 3rd place in the league, regulation decides up high club can go final even draw.) In the 2014 season they played in the promotion playoffs to J1 again. The club did not have to play in the semi-final(Chiba was 4th place but the 3rd place club named Giravanz Kitakyushu had a J League original stadium problem so Kitakyushu could not go to the promotion play off). In the final against Montedio Yamagata, they lost by 0–1, at Ajinomoto Stadium. The club will play their 14th consecutive season at the J2 on 2023. Symbols Stadiums It had played its home matches at Ichihara Seaside Stadium, but has since moved to the larger, football-specific and more conveniently located Fukuda Denshi Arena, which opened in Chiba during the 2005 season. The club had initially practiced at Urayasu, Chiba planning to base itself in Narashino, Chiba before opposition by those living around Akitsu Stadium