Casio Unveils New G-Shock Mudman With Earthwatch Japan Collaboration; Check Specifications

New G-Shock Mudman With Earthwatch Japan Collaboration: Casio has partnered with environmental organisation, Earthwatch Japan to unveil a new limited edition G-Shock Mudman watch. The GW-9503KJ has a nature inspired design with tough features.

Instead of usual releases that focus on colour, this special edition features a design inspired by the rare ‘shoebill’ bird, found in the wetlands of East and Central Africa. It also demonstrates Casio’s commitment to wildlife and the environment by highlighting wildlife conservation and research as part of their ongoing ‘Love The Sea And The Earth’ initiative.

With a blue grey exterior, gold accents, Tough Solar charging and Casio’s Triple Sensor Technology. The GW-9503KJ will be available to purchase in Japan in November 2026. It will cost ¥64,900.

Casio G-Shock Mudman GW-9503KJ Design

The main feature of this new G-Shock Mudman is the design inspired by the large ‘shoebill’ wading bird.

Casio has used a blue grey colour scheme to represent the body and feather of the bird. The stainless steel bezel has an ion plated finish to match. Gold accents surround the face and front button to represent the large bill of the bird.

Additional design features include:

Light beige strap clasp with the Earthwatch Japan Logo.
‘Change the World. Yourself.’ written on the strap.
LCD screen displays Earthwatch Japan Logo when the LED backlight is switched on.
Special engraving on the back of the case showing the ‘Love The Sea And The Earth’ logo.
Special packaging using recycled paper.

Casio G-Shock Mudman GW-9503KJ Features

Casio has kept true to the tough nature of the Mudman range. With a range of additional features for outdoor use. Here are the key features.

Model: GW-9503KJ-2JR
Series: G-Shock Master of G – Land Mudman
Size: 56.7 x 52.7 x 14.8mm
Weight: 88g
Case Material: Carbon Fibre Reinforced Resin & Resin
Band: Bio-based Resin
Display Type: Digital
Water Resistance: 200m (20bar)
Shock Proof
Mud Proof
World Time: 48 Cities
Lighting: Full Auto LED Super Illuminator

Triple Sensor

The most useful feature of the watch is the Triple Sensor. This includes:

Digital Compass: For measuring direction.
Altimeter: For measuring altitude.
Barometer: For tracking atmospheric pressure.
Thermometer: Measure temperature.

This makes this watch ideal for hikers, trekkers and outdoor lovers.

Why Has Casio Used A Shoebill Bird?

The ‘shoebill’ is one of the most well-known bird in the world due to it’s massive bill shaped like a shoe.

The scientific name for the bird is Balaeniceps rex. It can be found in freshwater wetlands throughout parts of East and Central Africa. It is commonly known as the stork however it is related more to pelicans.

The species is classed as Vulnerable (VU) on the IUCN Red List.

According to BirdLife International, the population has faced many threats such as habitat loss, hunting, disturbance around nests and changes to the climate.

Casio have chosen to use the ‘shoebill’ as a main feature in order to raise awareness around wildlife conservation.

How Does The Earthwatch Japan Partnership Help The Environment?

This new G-Shock watch is part of Casio’s ongoing ‘Love The Sea And The Earth’ initiative. Casio have partnered with environmental organisations since the 1990s.

Earthwatch Japan is linked to the global Earthwatch Institute. They help fund and volunteer for field research, conservation of biodiversity and scientific research.

A percentage of the profits from the sales of the GW-9503KJ will go towards helping Earthwatch Japan.

The watch uses bio-based plastics for the major plastic components of the watch such as the case, bezel and band. It also has special packaging using recycled paper.

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Casio G-Shock Mudman GW-9503KJ Price

Price: ¥64,900 (Tax Included)
Release Date: November 2026
Release Date (Retailer): November 13th, 2026

The official Japanese product page for Casio shows it will be priced at ¥64,900 and released in November 2026. The Clock House in Japan show it will be released on the 13th November. Pre-orders have also been listed in Japan.

Is There A Casio G-Shock Mudman GW-9503KJ Release In India?

As of the 2nd November 2026 there is no official release date or pricing in India. Customers will have to wait until Casio confirm if they will be releasing it in India.