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Casio is releasing three new Mudman GDG-B100 watches in Japan this October. The models are priced at ¥38,500 ($244) and are currently available for pre-order on the Casio Japan website.
Design Details
The lineup consists of the black GDG-B100-1, the olive-accented GDG-B100-1A3, and the tan-accented GDG-B100-1A5. This release integrates basic activity tracking and smartphone connectivity into the standard G-Shock digital watch format.
The watches feature a Memory in Pixel (MIP) LCD, which delivers better contrast than a conventional digital display and improves visibility under direct sunlight. Casio has also equipped the models with a red LED backlight for use in darker environments. The red illumination is particularly useful outdoors at night, as it helps preserve natural night vision compared to the white or blue backlights commonly used on digital watches.
For the exterior, the case uses a bumper guard design. The center case is positioned between a multifaceted front bezel and a rear bumper to handle physical impacts. As part of the Mudman line, the watch incorporates carbon fiber-reinforced resin and gaskets on the button shafts to block dirt, dust, and mud. The watch measures 63.6 x 49.6 x 16.2 mm and weighs 66 grams. The case, bezel, and band are manufactured using bio-based resins.
The GDG-B100 includes an accelerometer to track steps, pace, and calories burned. It does not have built-in GPS. Instead, it uses Bluetooth to connect to a smartphone via the Casio Watches app. You can calibrate the watch’s distance tracking using your phone’s GPS.
After this initial calibration, the watch can estimate distances independently. The Bluetooth connection also supports vibration alerts for incoming calls, emails, and app notifications, alongside automatic time syncing.
Casio uses a standard CR2032 coin-cell battery to power the watch, with an estimated lifespan of about two years. There is no Tough Solar support here, unlike some other models in the company’s lineup. The watch also offers 200-meter water resistance, stopwatch functionality, interval timers, and world time across 38 time zones.
In related news, Casio has recently launched two stunning square G-Shock watches featuring lab-grown blue sapphires, alongside three quirky G-Shock models inspired by sushi.
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