Description
CASIO G-SHOCK GW-9503KJ-2JR MUDMAN Earthwatch Japan 2026
The CASIO G-SHOCK GW-9503KJ-2JR is a 2026 Earthwatch Japan collaboration model from the MASTER OF G - LAND MUDMAN series. Inspired by the shoebill, its blue-gray exterior combines distinctive wildlife-inspired details with Tough Solar charging, MULTIBAND 6 radio-controlled timekeeping and Triple Sensor functions.
Shoebill-Inspired Color and Design
The main blue-gray color reflects the shoebill’s plumage. An ion-plated metal bezel adds a sheen inspired by the bird’s feathers, while gold-tone accents on the dial ring and front button, together with a light beige band keeper, reference its broad bill.
The band keeper carries the Earthwatch Japan logo, and the band is printed with the message “Change the World. Yourself.” Activating the LED backlight reveals the organization’s logo on the display. The case-back is engraved with the “LOVE THE SEA AND THE EARTH” symbol.
Tough Solar and MULTIBAND 6
Tough Solar converts light into energy to power the watch. From a full charge without further light exposure, operating time is approximately 6 months with normal function use, or approximately 26 months with power saving activated.
MULTIBAND 6 supports time calibration signals from six transmitters in Japan, China, the United States, Germany and the United Kingdom. Automatic and manual reception are available with a compatible Home City setting and suitable reception conditions. When calibration signals are not received, accuracy is rated at ±15 seconds per month.
Triple Sensor Field Functions
Direct-access buttons provide compass, altitude/barometric pressure and temperature measurements. The digital compass includes bearing memory, while the barometer provides pressure trend information and an alert for significant pressure changes. Sunrise and sunset time displays add further outdoor functionality.
The altimeter calculates relative altitude from atmospheric pressure, so changes in weather conditions can affect its readings. For ambient temperature measurement, remove the watch from your wrist and avoid the effects of body heat, moisture and direct sunlight.
MUDMAN Construction and Materials
Shock-resistant and dust- and mud-resistant construction is combined with a Carbon Core Guard structure and 20 bar water resistance. The case measures 56.7 × 52.7 × 14.8 mm, and the watch weighs 88 g.
The case and bezel material specification combines carbon-fiber-reinforced bio-based resin, bio-based resin and stainless steel. The band also uses bio-based resin, while mineral glass protects the digital display.
Practical Digital Functions
A Duplex LC display supports the watch’s digital information and compass graphics. World time covers 48 cities across 31 time zones, plus UTC. Additional functions include a 1/10-second stopwatch, a countdown timer, five alarms with one snooze alarm, an hourly time signal and a full auto-calendar.
The white LED Super Illuminator backlight features full-auto activation and selectable afterglow duration. A battery level indicator and power-saving function help manage the available charge.
Japanese Domestic Market Model
The GW-9503KJ-2JR is the Japanese Domestic Market reference for this collaboration model. This designation identifies its intended sales market and does not indicate the country of manufacture.
Key Highlights
- 2026 Earthwatch Japan collaboration with shoebill-inspired blue-gray styling.
- Ion-plated metal bezel, themed band details and an engraved case-back.
- Tough Solar charging and MULTIBAND 6 radio-controlled timekeeping.
- Triple Sensor compass, barometer, relative altimeter and thermometer.
- Shock-resistant, dust- and mud-resistant Carbon Core Guard construction.
- 20 bar water resistance and a full-auto LED Super Illuminator backlight.
Product Specifications
| Brand / Collection | CASIO G-SHOCK |
|---|---|
| Series | MASTER OF G - LAND / MUDMAN |
| Model | GW-9503KJ-2JR |
| Market | Japanese Domestic Market |
| Edition | Earthwatch Japan Collaboration Model 2026 |
| Design Theme | Shoebill |
| Watch Type | Men’s digital watch |
| Display | Duplex LC display |
| Exterior Color | Blue-gray with gold-tone accents and a light beige band keeper |
| Case Dimensions | 56.7 × 52.7 × 14.8 mm (height × width × thickness) |
| Weight | 88 g |
| Case / Bezel Material | Carbon-fiber-reinforced bio-based resin / bio-based resin / stainless steel |
| Bezel Finish | Blue-gray ion plating |
| Crystal | Mineral glass |
| Case-Back | Engraved “LOVE THE SEA AND THE EARTH” symbol |
| Band | Bio-based resin band with collaboration message and logo details |
| Compatible Wrist Size | 145–215 mm |
| Movement Type | Solar-powered quartz with radio-controlled timekeeping |
| Module | 3553 |
| Power Source | Tough Solar rechargeable system |
| Operating Time | From a full charge without further light exposure: approximately 6 months with normal function use; approximately 26 months with power saving activated |
| Accuracy | ±15 seconds per month when time calibration signals are not received |
| Radio Reception | MULTIBAND 6: Japan (two JJY transmitters), United States (WWVB), United Kingdom (MSF), Germany (DCF77) and China (BPC); automatic and manual reception with a compatible Home City setting |
| Digital Compass | 16 directions; 0–359° bearing measurement; 60-second continuous measurement; bearing memory; magnetic declination correction |
| Barometer | 260–1,100 hPa; 42-hour pressure trend graph; pressure differential graphic; pressure trend information alarm |
| Altimeter | Relative altitude: −700 to 10,000 m; altitude memory and altitude differential measurement. Readings are affected by atmospheric pressure changes. |
| Thermometer | −10 to 60°C. For ambient readings, remove the watch from the wrist and avoid body heat, moisture and direct sunlight. |
| World Time | 48 cities across 31 time zones plus UTC; daylight saving setting |
| Sunrise / Sunset | Sunrise and sunset time display |
| Stopwatch | 1/10-second measurement; 1,000-hour capacity; split time |
| Countdown Timer | Up to 24 hours; 1-minute setting increments; 1-second measurement |
| Alarms | 5 time alarms, including 1 snooze alarm; hourly time signal |
| Light | White LED Super Illuminator backlight; full-auto light; selectable 1.5- or 3-second afterglow; Earthwatch Japan logo revealed when illuminated |
| Additional Functions | Full auto-calendar; 12/24-hour format; button operation tone on/off; battery level indicator; power saving |
| Construction | Shock-resistant; dust- and mud-resistant; Carbon Core Guard structure |
| Water Resistance | 20 bar |
| Scheduled Release | November 13, 2026 (Japan) |
| JAN Code | 4549526434013 |