Omiya Ardija

The team were founded in 1968 as NTT Saitama Soccer Selection in Urawa, Saitama and later known as the NTT Kantō Soccer Club in 1969. They were first promoted to the Japan Soccer League (JSL) Division 2 in 1987/88, and when the JSL folded, joined the former Japan Football League.

In 1998 it was separately incorporated as NTT Sport Community K.K. based in Ōmiya to participate in the J. League. The name "Ardija" is a transcription of the Spanish language ardilla (squirrel) which is the mascot of Ōmiya and the park in which their home stadium is located.

Their matches against Urawa Red Diamonds have been called the "Saitama derby".

In 2005–2007 most of Omiya's home matches were held at Saitama Stadium 2002 and Urawa Komaba Stadium due to expansion works at their home ground. In October 2007 the expansion was complete. On November 11, the re-opening match was held as a J. League season match between the Ardija and Ōita Trinita (1–2).

Omiya competed in the J1 League following an immediate promotion in 2015 after being relegated in 2014. Omiya was relegated again following the 2017 season. They competed in J1 2005 and continued to remain until 2014, following promotion from J2 in 2004 as the second placed team.

In 2023, Omiya were relegated to J3 League after six seasons stint in second division due to worst performance and will play third division football for the first time since 1993.

On 15 February 2024, before the start of the season, Sports Nippon reported that Austrian energy drink maker Red Bull may buy a J.League club, and that Omiya Ardija was the leading candidate. On July 26 of the same year, the Nihon Keizai Shimbun reported that Red Bull had reached an agreement in principle to buy Omiya Ardija.

In August 2024, Omiya Ardija announced Red Bull as their new owner, after acquiring 100% of the club shares, formerly owned by NTT, becoming part of their multi-club ownership. This will be the first time that a foreign company has become the sole owner of a major Japanese professional sports team, including the J.League. Red Bull began by acquiring management rights to Austrian first division club Salzburg in 2005 and now owns six clubs: Leipzig in Bundesliga, New York Red Bulls in the United States MLS, Liefering in Admiral 2. Liga, Bragantino in Campeonato Brasileiro Serie A and Red Bull Brasil (now Red Bull Bragantino II) in the Sao Paulo State Championship. In the past, they also owned Red Bull Ghana in Africa and Omiya will be the eighth club they own.

NTT East will continue to support the company as a sponsor even after the transfer of shares.

On 13 October 2024, Omiya secure promotion to J2 League after defeat Fukushima United 3-2 and return to second tier after one year absence. Six days later, Omiya secure first title of J3 League after draw against FC Imabari 1-1 on matchweek 33.