G-Shock Watch MR-G Kachi Iro Bluetooth Smartwatch MRG-B2000R-1ADR. This model dress up the top-of-the-line G-SHOCK, the MR-G, in the traditional Japanese color known as kachi-iro (winning color). A dark navy blue color with a long history in Japan, the winning color kachi-iro was preferred by samurai, and was often used for armor and helmets. This means that this new MR-G model adopt the very spirit of the samurai warrior. Base model is the MRG-B2000.