Description Available in: JEF United Chiba (ジェフユナイテッド千葉, Jefu Yunaiteddo Chiba), full name JEF United Ichihara Chiba and also known as JEF Chiba (ジェフ千葉, Jefu Chiba), is a Japanese professional football club that plays in the J2 League. On 1 February 2005, the club changed its name from JEF United Ichihara to the current name after Chiba city had joined Ichihara, Chiba as its hometown in 2003. Of its club name, JEF is taken from the JR East and Furukawa Electric companies and United is meant to represent the unity of the team and its home city.