Abstract: Provided is a gasket capable of reducing the risk of water leakage from a sealing member for use to join a ceramic member. The gasket is made of elastic material and usable for joining two members which form a flow passage for liquid, and at least one of which is a ceramic member. The gasket includes: a base having a loop shape; a protrusion standing on the base, extending along the loop shape, and protruding toward one of the members; and a retainer formed on an inner periphery of the base and protruding from the inner periphery in an inward direction with respect to the loop shape.

Abstract: To provide a toilet bowl device allowing bubbles to be discharged with ease even in a case where a bowl is supplied with the bubbles. In a toilet bowl device, a control unit executes a pre-jet washing step for bubbles of supplying wash water to a bowl via a jet discharge port and a pre-rim washing step for bubbles of supplying wash water to the bowl via a rim discharge port after the pre-jet washing step for bubbles is initiated in a case where bubbles are present on a stored water surface.

Abstract: A flush toilet of the present invention includes a bowl; a toilet drainage water pathway which communicates with the bowl and a drainage water socket and into which a cleaning water flows from the bowl; and a valve portion which includes a rotating axis and a flapper, and which is configured to open and close the toilet drainage water pathway, the rotating axis being provided in the toilet drainage water pathway, the flapper being connected to the rotating axis and being provided so as to be capable of rotating about the rotating axis.

Abstract: A flush toilet of the present invention includes a bowl; a toilet drainage water pathway which communicates with the bowl and a drainage water socket and into which a cleaning water flows from the bowl; and a valve portion which includes a rotating axis and a flapper, and which is configured to open and close the toilet drainage water pathway, the rotating axis being provided in the toilet drainage water pathway, the flapper being connected to the rotating axis and being provided so as to be capable of rotating about the rotating axis.