The present application describes a gooseneck coupler assembly that may include a gooseneck trailer pivot, an extension arm, and a pivot retention mechanism having a ball socket. The system includes a plurality of storage facilities with each storage facility storing data that represents rows of database tables. Fasteners attached to such containers, in addition to closing the opening of the containers, allow for quick attachment and detachment of the containers to and from a fishing rod, thereby capturing and retaining line and thus minimizing entanglement. The invention is also applicable to single-disk-drive storage systems. A defect detecting circuit is also provided to detect a defect of the object, based upon image data associated with the reflected and transmitted light. The operation panel accordingly generated is displayed together with a game world, a character associated with a character piece selected by the player is caused to appear in the game world, and an action of the character is controlled based on the player instruction.