JEF United Ichihara Chiba is a professional football club based in the cities of Ichihara and Chiba in Chiba Prefecture, Japan, currently playing in the J2 League. The club's official name is JEF United Ichihara Chiba, and they play at the Fukuda Denshi Arena. Founded in 1991 as a merger of two company teams, the club's colors are green and yellow. The 'JEF' in their name originates from the JR East and Furukawa Electric company roots. The club enjoyed a successful period in the early J.League era, known for a passionate style and a strong fanbase, and they famously won the Emperor's Cup in 2005 and 2006 under manager Ivica Osim, which stands as their key era of achievement. Since relegation from J1 in 2009, the modern era has seen JEF United become a staple of J2, often challenging for promotion playoffs but yet to make a sustained return to the top division. They are renowned for one of the most loyal and vocal supporter groups in Japanese football, creating an intimidating atmosphere at their distinctive arena. JEF United remains a club with a rich history and a massive potential, forever aiming to climb back to the J1 summit.