What is the unit of the physical quantity "Heat capacity"?

Heat capacity ($S$) is defined as the amount of heat energy ($Q$) required to raise the temperature ($\Delta T$) of a given substance by one unit.
$$S=\frac{Q}{\Delta T}$$
The SI unit of heat energy is Joule ($\text{J}$) and that of temperature change is Kelvin ($\text{K}$). Therefore, the SI unit of heat capacity is joule per kelvin ($\text{J/K}$).