Summary statement	Average agreement score and rate of agreement
1. Longer disease duration and extensive disease are related to a higher risk of CRC development in IBD (EL2). There is a need for surveillance for colitis-associated dysplasia/cancer in patients with macroscopically or microscopically active inflammation.	8.0 (91%)
2. PSC is related to the development of dysplasia and CRC in UC. At the time of diagnosis of the complication, surveillance with colonoscopy is necessary (EL2). In Japan, there are much fewer UC cases with comorbid PSC compared with Western countries (EL3). However, surveillance and caution towards the development of CRC still seem necessary.	7.7 (90%)
3. Histological inflammation score is related to dysplasia and CRC occurring in UC (EL3). Therefore, surveillance should now be considered based on past disease activity.	7.8 (90%)
4. Family history of sporadic CRC in immediate family members is related to the onset of CRC in IBD (EL3). However, there are no data confirming this for Japan.	7.6 (85%)
5. Surveillance is required for rectal cancer and fistula cancer with regards to CD patients with intractable anal lesions (EL3).	8.6 (100%)