Fuel gas storage system

A fuel gas storage system comprising:

• a first tank configured to store fuel gas and including a first supply valve and a first communication valve, the first supply valve being disposed at a first end of the first tank, and the first communication valve being disposed at a second end of the first tank that is opposite to the first end in a longitudinal direction of the first tank;
• a second tank configured to store the fuel gas and including a second supply valve and a second communication valve, the second supply valve being disposed at a first end of the second tank, and the second communication valve being disposed at a second end of the second tank that is opposite to the first end in a longitudinal direction of the second tank;
• a supply pipe connecting the first supply valve and the second supply valve to an external device;
• a communication pipe connecting the first communication valve and the second communication valve to each other;
• and
• a control unit configured to control an opened-closed state of each of the first supply valve, the second supply valve, the first communication valve, and the second communication valve, wherein the control unit is configured to execute specific control to close the first supply valve, and open the first communication valve, the second communication valve, and the second supply valve such that the fuel gas stored in the first tank flows to the external device via the first communication valve, the communication pipe, the second communication valve, the second tank, the second supply valve, and the supply pipe.