Also known as: トラテープ, キープアウトテープ, 警戒线, 隔离带
Various colored tape that can carry words like "Keep Out" or "Crime scene: Do not enter". Usually the tape has a yellow background with black text, but other variants do exist like orange/black or in the case of police caution tape, white background with blue or black text with or without a checkered square pattern.
May or may not be adhesive. Most caution tape are designed to be strung between two or more points.