The all-new G-Shock G-STEEL GST-B500 series is scheduled for an April 2022 release in Japan. The new design is reminiscent of the GST-B400 but with the body style of earlier G-STEEL models and a more minimalist dial layout. The LCD display is now a single section on the lower right that resembles the GA-2100. The watch appears to be a Carbon Core Guard model and is 0.1 millimeter thinner (12.8mm) than the GST-B400, making it the thinnest G-STEEL model to date. It is expected to have the same features as the GST-B400, including Tough Solar power and Bluetooth smartphone link.
The launch models include the silver GST-B500D-1A, silver GST-B500D-1A1 with all black dial, silver GST-B500AD-3A with green dial, black GST-B500BD-1A, and gold GST-B500GD-9A. All models have a stainless steel band and an inverted LCD display. The GST-B500 series is also expected to be released worldwide.
Update: The full measurements are 46.6 x 48.9 x 12.8 millimeters and the weight is 143 grams, which also makes it the lightest G-STEEL model with a stainless steel band. The watch is a Carbon Core Guard model with mineral glass and Neobrite lume, and the features are confirmed to be the same as the GST-B400. The wearable size of the stainless steel band is 150-205 millimeters. Bluetooth features include auto time adjustment, easy watch setting, world time with about 300 cities, time & place log, reminders, and phone finder.
Update: The debut GST-B500 models were not released in the U.S., but black and gold GSTB500BD1A9 is a September 2022 release there.
G-Shock G-STEEL GST-B500D-1A: Silver. Japan model is GST-B500D-1AJF (49,500 yen tax included).
G-Shock G-STEEL GST-B500D-1A1: Silver with all black dial. Japan model is GST-B500D-1A1JF (49,500 yen).
G-Shock G-STEEL GST-B500AD-3A: Silver with green dial. The resin exterior parts are green to match the dial, unlike the black resin exterior parts of the other models. Japan model GST-B500AD-3AJF (49,500 yen).
G-Shock G-STEEL GST-B500BD-1A: Black with all black dial. Japan model is GST-B500BD-1AJF (60,500 yen).
G-Shock G-STEEL GST-B500GD-9A: Gold. Japan model is GST-B500GD-9AJF (60,500 yen).