A communication apparatus includes a communication start request receiving unit and a response notification output unit. The communication start request receiving unit receives, via a first communication path, a communication start request that is output from a source communication apparatus and is transmitted via a relay apparatus. The response notification output unit outputs a first response notification or a second response notification to the relay apparatus via the first communication path when the communication start request receiving unit receives, via the first communication path, a communication start request for starting communication using a second communication standard in a case where the number of apparatuses with which the communication apparatus is communicating using the second communication standard has reached a predetermined number. The first response notification indicates that communication is being performed. The second response notification has a lower priority than the first response notification in an arbitration process.