In 1999, they were relegated to the second tier of Japanese football once again., the club's performance has improved in years, beginning with a victory in the 2003 Nabisco Cup.

In 2006, Urawa Reds clinched their first professional league title by defeating runners-up Gamba Osaka 3–2 on December 2 in front of 63,000 supporters.

This run included losing at home to Kashima Antlers; the club who would leapfrog Urawa on the final day of the season to claim their fifth J.League title.

Urawa Reds recorded their first prestigious cup overcoming Iranian club Sepahan 3–1 on aggregate to clinch the 2007 AFC Champions League trophy.

[3] In the 2017 AFC Champions League edition, Urawa Reds had a good run throughout the entire tournament which saw them face Saudi Arabia club, Al-Hilal in the final which saw Urawa Reds winning the 2017 AFC Champions League final 2–1 on aggregate to clinch their 2nd trophy.

Urawa Reds managed to make their way through all the way until the 2019 AFC Champions League final facing off against Al-Hilal once again.

The club faced their tournament rivals Al-Hilal for the third time in the 2022 AFC Champions League final.

[4] The club is also notable in that former Feyenoord midfielder Shinji Ono began his professional career playing for Urawa Reds.

[5] Karl-Heinz Rummenigge, the chairman of the Bayern Munich, announced that "We have been looking for clubs which have potential ability, management stability and cordial confidence.

In August 2004, Urawa Reds appeared in a pre-season four-club friendly tournament, the Vodafone Cup, at Old Trafford, the home ground of Manchester United.

Urawa Reds missed a few key players, losing their first match 5–2 against the Argentinian side Boca Juniors.

Due to the increasing popularity of the matches, Saitama City, owner of the stadium, expanded the seat capacity.

[10] Urawa Red Diamonds has a local derby with Omiya Ardija, from Ōmiya-ku, Saitama city.

Rivals further afield include Kashima Antlers, FC 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.

The club also has a women's football team, currently playing in the WE League as Urawa Red Diamonds Ladies.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.