Decision system, decision method, and non-transitory storage medium

A decision system comprising:

• a tool comprising:
• a body,
• a barrel included in the body,
• a driving unit housed in the barrel,
• an output shaft protruding from the barrel and rotated by the driving unit, and
• an image capturing unit attached to the barrel, whose optical axis is substantially aligned with a rotational axis of the output shaft;
• one or more memories;
• and
• at least one processor coupled to at least one of the one or more memories and configured to:
• identify, by performing identification processing based on a captured image, a work target shot as a subject of the captured image as one of a plurality of work targets, the captured image being generated by the image capturing unit;
• and
• decide, through decision processing, whether a first work target is a mistakable work target by comparing, by reference to at least one reference image, the first work target with a second work target,
• wherein:
• the first work target and the second work target are both included in the plurality of work targets,
• the second work target is either similar or unsimilar to the first work target,
• the second work target similar to the first work target makes the first work target the mistakable work target that is difficult to identify based on the captured image, and
• the at least one reference image belongs to a plurality of reference images corresponding one to one to the plurality of work targets.