Hydrocarbon production apparatus, hydrocarbon production method, and non-transitory computer readable medium

A hydrocarbon production apparatus, comprising:

• a reaction apparatus that causes a first raw gas including hydrogen and a second raw gas including carbon monoxide and/or carbon dioxide to react with each other, to thereby generate hydrocarbon;
• a control device that executes first control of changing one of a flow rate of the first raw gas supplied to the reaction apparatus or a flow rate of the second raw gas supplied to the reaction apparatus;
• a detection device that detects a concentration of the hydrocarbon included in a generated gas discharged from the reaction apparatus;
• and
• an acquisition device that acquires, for a plurality of times, the concentration of the hydrocarbon detected by the detection device in association with one of the flow rate of the first raw gas corresponding to the concentration of the hydrocarbon or the flow rate of the second raw gas corresponding to the concentration of the hydrocarbon while the first control is being executed by the control device.