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Figure 5. Colorectal endoscopic submucosal dissection (ESD) using the SB Knife Jr: (A) submucosal injection was started from the anal side; (B) circumferential incision similar to cutting paper with scissors; (C) submucosal dissection by grasping the target tissue (1/3 from the bottom of the submucosa); (D) pulling the knife slightly and after confirming the safety and applying the electric current for cutting; (E) prophylactic hemostasis for large vessels; (F) submucosal dissection advanced towards the oral side of the lesion; (G) mucosal defect after en bloc resection; and (H) pathological mapping with the histology showing intramucosal cancer with a negative margin.