Gas filling system

A gas filling system comprising:

• a vehicle having a gas tank;
• and
• a gas station that supplies the gas tank with gas, wherein:
• the vehicle includes a vehicle-side controller having a filling protocol, specific to, and stored in, the vehicle, that specifies a method of control, performed on the gas station side, that is used to fill the gas into the gas tank;
• and
• the gas station controls filling of the gas into the gas tank according to the filling protocol provided by the vehicle-side controller;
• the filling protocol includes a filling flow rate table in which one axis indicates tank pressure and the other axis indicates tank temperature,
• the filling flow rate, detected at each time of filling, is based on both a detected tank pressure and a detected tank temperature,
• the filling protocol is determined based on a characteristic of the gas tank, and
• the characteristic of the gas tank is heat dissipation capacity of the gas tank.