INPUT DEVICE, INPUT SYSTEM, INFORMATION PROCESSING SYSTEM, COMPUTER-READABLE STORAGE MEDIUM HAVING STORED THEREON INFORMATION PROCESSING PROGRAM, AND INFORMATION PROCESSING METHOD

An example input device or the like includes: an input member; a sensing member for sensing a direction of an input operation conducted against the input member; a disposition member on which the sensing member is disposed; and a data processor capable of processing sense data sensed based on the sensing member and outputting output data of a predetermined output direction. The sensing member is disposed on the disposition member such that the direction sensible by the sensing member is rotated by a predetermined rotation angle with respect to the predetermined output direction, and the data processor is configured to execute an arithmetic process of rotational conversion to rotate the sense data in a direction opposite of a rotation direction of the predetermined rotation angle to output of the result of the arithmetic process as output data.