A toilet apparatus, comprising: a toilet in which a bowl for receiving solid waste is formed,; a control unit; a spray unit configured to spray at least one selected from water and hypochlorous acid water onto a surface of the bowl based on a command from the control unit; characterized in that: the bowl has a hydrophilic surface [paragraph 0021] the toilet apparatus further comprises a detection unit having at least one selected from a room entrance detection sensor, a human body detection sensor, and a seat contact detection sensor, the room entrance detection sensor being configured to detect a user entering a toilet room, the human body detection sensor being configured to detect a user in front of a toilet seat provided on the toilet, the seat contact detection sensor being configured to detect a user seated on the toilet seat provided on the toilet; and the control unit is configured to execute a control to spray at least one selected from the water and the hypochlorous acid water from the spray unit before use of the toilet when the detection unit detects the user and to spray the hypochlorous acid water from the spray unit after use of the toilet when a prescribed amount of time has passed from when the detection unit no longer detects the user. a toilet in which a bowl for receiving solid waste is formed,; a control unit; a spray unit configured to spray at least one selected from water and hypochlorous acid water onto a surface of the bowl based on a command from the control unit; characterized in that: the bowl has a hydrophilic surface [paragraph 0021] the toilet apparatus further comprises a detection unit having at least one selected from a room entrance detection sensor, a human body detection sensor, and a seat contact detection sensor, the room entrance detection sensor being configured to detect a user entering a toilet room, the human body detection sensor being configured to detect a user in front of a toilet seat provided on the toilet, the seat contact detection sensor being configured to detect a user seated on the toilet seat provided on the toilet; and the control unit is configured to execute a control to spray at least one selected from the water and the hypochlorous acid water from the spray unit before use of the toilet when the detection unit detects the user and to spray the hypochlorous acid water from the spray unit after use of the toilet when a prescribed amount of time has passed from when the detection unit no longer detects the user. the bowl has a hydrophilic surface [paragraph 0021] the toilet apparatus further comprises a detection unit having at least one selected from a room entrance detection sensor, a human body detection sensor, and a seat contact detection sensor, the room entrance detection sensor being configured to detect a user entering a toilet room, the human body detection sensor being configured to detect a user in front of a toilet seat provided on the toilet, the seat contact detection sensor being configured to detect a user seated on the toilet seat provided on the toilet; and the control unit is configured to execute a control to spray at least one selected from the water and the hypochlorous acid water from the spray unit before use of the toilet when the detection unit detects the user and to spray the hypochlorous acid water from the spray unit after use of the toilet when a prescribed amount of time has passed from when the detection unit no longer detects the user.