Rivalries
Urawa Red Diamonds has a local derby with Omiya Ardija, from Omiya-ku, Saitama city. They first met in the 1987 Emperor's Cup, with Mitsubishi defeating NTT Kanto by 5 to 0 at Nishigaoka National Stadium. The derby first took place in the JSL Second Division in the 1989–90 season, and it wouldn't take place until the 2000 season when Urawa was relegated to the second tier again. In 2003 the formerly separate Omiya and Urawa cities merged to become Saitama city, and since 2005 the derby became a top flight fixture after Omiya was promoted.
During the JSL years and into the 1990s, Urawa's main top flight rivals were JEF United Ichihara Chiba and Kashiwa Reysol, both now based in Chiba Prefecture. Because of their former parent companies' headquarters being all based in Marunouchi, Tokyo, the three clubs were known as 丸の内御三家 Marunouchi Gosanke ("Marunouchi Big Three") and fixtures between them were known as Marunouchi derbies, although the term is falling out of use as they are now based in different prefectures and rarely play home games in Tokyo stadiums.
Rivals further afield include Kashima Antlers, F.C. Tokyo, Yokohama Marinos, Kawasaki Frontale, and, even farther away, Gamba Osaka. Old JSL championship rivalries with Sanfrecce Hiroshima, Cerezo Osaka and Shonan Bellmare have ebbed down as those clubs had nadirs in the second tier.
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