Casio has launched four new G-Shock watches in Japan: the GMA-P2100SA-1A1, the GMA-P2100SA-1A2, the GMA-S120SA-7A1 and the GMA-S120SA-7A2. The GMA-P2100SA are black watches with an octagonal bezel, while the GMA-S120SA are white with a chunkier design. Features include support for various world time zones, 20 ATM water resistance and five daily alarms.