Inspection system for welded portion

An inspection system for a welded portion in welding, the inspection system comprising:

• a display unit;
• an acquisition unit that acquires a reference position of the welded portion stored in a storage device;
• a display control unit that causes the display unit to virtually superimpose a reference position image on a captured image to display the reference position image, the captured image being a captured image of a welded object in a real space captured by an imaging device, the captured image being a captured image including the welded portion, and the reference position image being an image indicating the reference position;
• and
• a distance calculation unit that calculates a distance in the real space between the welded portion in the real space displayed on the display unit and the reference position of the welded portion.