A Study on the Safety of TAK-279 and Whether it Can Reduce Inflammation in the Bowel of Participants With Moderately to Severely Active Ulcerative Colitis

Who May Qualify: 1. Male or female aged 18-75 years old with diagnosis of UC for at least 30 days. In South Korea, the age requirement for adult participants is ≥19 years of age. 2. Confirmed diagnosis of moderately to severely active UC assessed by mMS and ES. 3. Participants with a history of inadequate response to, loss of response to, or intolerance to one or more of conventional, biologic or advance therapies for UC. 4. Participants must meet the contraception recommendations. Who Should NOT Join This Trial: 1. Participants with indeterminate/unclassified inflammatory bowel disease (IBD), microscopic colitis, ischemic colitis, infectious colitis, radiation colitis, diverticular disease associated with colitis, and/or clinical/histologic findings suggestive of Crohn's disease (CD). 2. Participants with complications of UC such as strictures, stenoses, fistulas, short gut syndrome, or any other manifestation that might require surgery during the study. 3. Participants with a current ileostomy or colostomy. Participants who had a J-pouch are excluded, as a J-pouch could result in a stoma. 4. Participants who have failed 3 or more classes of advanced therapies. Always talk to your doctor about whether this trial is right for you.