Abstract: There is provided a bathtub apparatus capable of satisfactorily detecting an electrocardiographic signal even in a state where water is being discharged into a bathtub by a water discharge device. The present invention is a bathtub apparatus (1) including a bathtub main body (2), a water discharge device (8) that discharges water toward inside of the bathtub main body and is provided above a first inner wall surface (2a) forming a short side of the bathtub main body, and electrodes (4a, 4b, 4c) attached to the bathtub main body to detect an electrocardiographic signal of a bathing person, where the electrodes are arranged on an inner wall surface of the bathtub main body, and are arranged closer to the first inner wall surface than a position (P) where water discharged from the water discharge device hits a water surface of the water stored in the bathtub main body.

Abstract: A defecation recording system according to an embodiment includes: a toilet bowl which is installed in a toilet room; a user identification device which identifies a user who uses the toilet bowl; a detection device which detects feces discharged into the toilet bowl; a determination device which determines a property of the feces from a detection result of the detection device; a clocking device which acquires time information indicating date and time of detection of the detection device; a recording device which records the property of the feces and the time information as personal data in association with the user identified by the user identification device; and a display device which displays information regarding the feces based on the personal data recorded in the recording device.