Photo: Casio
Earthwatch's 2026 watch paints a full-size Mudman in a vulnerable bird's colours — and hides the charity's logo in the backlight.
Verdict
| What it is | Casio G-Shock Mudman GW-9503KJ-2JR — the 2026 "Love The Sea And The Earth" edition with Earthwatch Japan, in the shoebill's colours: blue-grey body, gold dial ring and front button, light-beige keeper |
| Price | ¥64,900 incl. tax — Casio Japan, checked Tue Nov 10, 2026 |
| Availability | Japan only. Pre-orders open at check; releases Fri Nov 13, 2026. No edition size published, and no US price exists |
| The angle | The partner is threaded through the tool — keeper, backlight, caseback — not just the colourway |
| Verdict | The tool underneath is unchanged; the colours make the argument. |
What it is
Every year Casio's "Love The Sea And The Earth" editions pick a creature and build the watch around it. For 2026, with Earthwatch Japan, it is the shoebill — a metre-tall wetland bird, listed as Vulnerable, whose whole presence is beak. Casio's own design notes map the bird onto the watch directly: the main colour is the blue-grey of its plumage, the metal bezel gets an IP finish for a feather's sheen, and the beak is carried by the gold of the dial ring and front button together with the light-beige keeper.
The Earthwatch thread runs past the colours. The logo is printed on the keeper; light the LED backlight and the same logo surfaces on the LCD. The band is printed "Change the World. Yourself.", the caseback is engraved with the edition's symbol mark, the box is recycled paper, and part of the sales proceeds fund Earthwatch Japan's field research. The case, bezel and band's main resin parts are biomass plastic, per Casio's footnote.
Why it matters
Collaboration G-Shocks usually stop at the colourway. This one puts the partner inside the functions — the logo lives in the backlight, a thing you use — and leaves the tool spec untouched: Carbon Core Guard structure, mud-sealed buttons, Triple Sensor with one-push direct buttons, Tough Solar, Multi Band 6, 20 bar. Nothing was traded for the story. The honest limits are size and geography: it is 56.7mm across and 88g, which is the large end of the line by any measure, and Casio sells it only in Japan, at a yen price with no dollar equivalent published. Buy it as what it is — a full-size Japanese field tool wearing a vulnerable bird's colours, plainly.
Specs
| Brand | Casio — G-Shock |
| Model | Mudman GW-9503KJ-2JR (module 3553) |
| Case | 56.7 × 52.7 × 14.8mm — Carbon Core Guard structure; biomass plastic main resin parts (per maker) |
| Weight | 88g (maker's figure) |
| Crystal | Mineral glass |
| Resistance | Shock resistant; mud/dust resistant (sealed buttons); 20 bar (200m) |
| Functions | Triple Sensor — compass, barometer/altimeter, thermometer; sunrise/sunset; world time (48 cities); full-auto LED backlight; duplex LCD |
| Power | Tough Solar — approx. 6 months on a full charge, 26 months in power-save (per maker) |
| Radio | Multi Band 6 |
| Band fit | 145–215mm; made in Thailand |
What to check before buying
- Read the dimensions first. 56.7mm across, 14.8mm thick, 88g. This is the largest end of the Mudman line — the size is part of the tool, and it will not wear small on any wrist.
- Japan only means Japan only. There is no US price and no US listing; Casio publishes none. Any route to one is an import, and no converted price is printed here because the maker hasn't published one.
- The release is Nov 13. Casio's product page states November 2026 and took pre-orders at check; the exact day comes from Casio's press release. Edition size: none published — treat any number you see elsewhere as unsourced.
Price record
| Price | ¥64,900 incl. tax |
| Source | Casio's Japan product page (casio.com/jp), checked Tue Nov 10, 2026 — listed in stock for pre-order at check |
| Featured | Site-first, Tue Nov 10, 2026 — the Instagram post follows as part of a combined carousel |
Want one?
- In the shop: browse current stock — one-off pieces, and they turn over fast.
- Hunting one? Join the Want List — tell us the maker and the budget; pieces like this surface in our trawl most weeks.
- This one: at the source — See it at Casio (Japan). Not our listing. See Disclosure.
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- BOLDR Odyssey Orca — a titanium GMT diver, at $699
- Nodus Sector II Field Titanium — Dusk, at $600
- Stowa Flieger Verus Black Forest Foxfire — the full-lume flieger
Spotted, not sold by us — this watch lives at Casio's Japan store. Prices are a snapshot from when we spotted it. Disclosure
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Shop the pick
Casio G-Shock Mudman GW-9503KJ-2JR — Earthwatch
¥64,900 incl. tax — Casio Japan, checked Tue Nov 10, 2026
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