An object is to provide a light-emitting element which exhibits light emission with high luminance and can be driven at low voltage. The bicycle includes a seat assembly 70 that supports the anterior pelvic region so the rider extends forwardly over the bicycle instead of in an upright position. In the second control area 15, predetermined physical format information and disk production information, for example, the last address of when data is written in the DVD-R 1, the maximum transfer rate or the like, are recorded.