Liquid ejection system

A liquid ejection system capable of ejecting a liquid toward a targeted medium, the liquid ejection system comprising:

• a mechanism unit that includes a liquid ejection head configured to eject the liquid, and to change a relative position of the medium relative to the liquid ejection head;
• a liquid storage container comprising a liquid storage portion configured to store the liquid that is to be supplied to the liquid ejection head;
• and
• an air introduction portion that is in communication with the liquid storage portion and is configured to introduce air into the liquid storage portion,
• wherein a liquid injection portion configured to enable injection of the liquid into the liquid storage portion is provided in the liquid storage container,
• in an orientation in which the liquid injection portion faces a direction upward relative to a horizontal direction, in a plan view of the mechanism unit from vertically above, at least a portion of the liquid storage container excluding the liquid injection portion is overlapped with at least a first portion of the mechanism unit,
• the portion of the liquid storage container that is overlapped with the first portion of the mechanism unit is located vertically below the first portion of the mechanism unit,
• in the orientation in which the liquid injection portion faces a direction upward relative to the horizontal direction, in a plan view of the mechanism unit from vertically above, at least a portion of the air introduction portion is overlapped with at least a second portion of the mechanism unit, and
• the portion of the air introduction portion that is overlapped with the second portion of the mechanism unit is located vertically above the mechanism unit.