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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteCasio’s ring-sized G-SHOCK is the DWN-5600, also called the G-SHOCK Nano. Casio announced it on October 21, 2025, and scheduled its Japan release for November 8, 2025. The company specifies shock resistance and 20-bar water resistance—equivalent to 200 meters in Casio’s product-page wording—alongside core digital-watch functions in a compact resin design. These are manufacturer specifications, not independent test results.
What is the Casio ring G-SHOCK?
The DWN-5600 is a miniature digital watch styled after the square-faced 5600-series G-SHOCK. Its case measures 23.4 × 20 × 7.5 mm. Casio describes it as about one-tenth the size of a regular G-SHOCK, comparing it with the DW-5600UE in its Japanese announcement. The band is resin and adjusts through a series of holes, so the watch can be fitted around a finger.
Casio announced three color variants: black DWN-5600-1, red DWN-5600-4 and yellow DWN-5600-9. Its Japan announcement listed a suggested retail price of ¥14,300 including tax at launch; that is historical Japan pricing, not a current or worldwide price. Casio’s October 21, 2025 announcement
Is the G-SHOCK ring watch shock resistant?
Yes. Casio specifies the DWN-5600 as shock resistant. Its small size does not make it the same product as Casio’s earlier CRW-001 ring watch: the DWN-5600 is explicitly presented as a G-SHOCK with shock-resistant construction. Casio has not provided an independent durability test in the cited product materials, so the claim should be understood as the manufacturer’s specification.
#1 Best Overall
- Rugged & Sporty Design – Matte black finish with bold digital display, built for tactical, military, and extreme sports enthusiasts.
- High-Brightness LED Backlight – Features Super Illuminator LED with a light guide plate, ensuring exceptional visibility in low-light conditions.
- 200M Water Resistance – Engineered for swimming, snorkeling, and outdoor adventures, this shock-resistant watch is ready for action.
- Extended 7-Year Battery Life – Powered by a CR2025 battery, offering years of reliable performance without frequent replacements.
- Shock-Resistant Structure – Built to withstand extreme conditions, making it ideal for sports, military, and rugged outdoor use.
Casio says the case is made of glass-fiber-reinforced resin, with a urethane bezel covering the case. The button, buckle and case back are stainless steel. The company describes a high-density module layout and miniature battery, and says key resin components in the bezel and band use bio-based resin. Its product-planning interview explains that miniaturization made sealing the side buttons a particular engineering challenge; the described design uses two gaskets and an E-ring to retain each button. Casio’s DWN-5600 development interview
How water resistant is the Casio G-SHOCK ring?
Casio rates the DWN-5600 at 20 bar. Its English product page describes that specification as water resistant up to 200 meters. This is the manufacturer’s rating, not an independent test or a guarantee that every underwater activity is suitable; the cited materials do not give activity-specific use guidance. Casio’s DWN-5600 product specifications
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- Metal-clad daring meets sophisticated gleam in this Casio G-Shock that delivers Smartphone Link via Bluetooth(R) and Tough Solar charging system, all in a meticulously finished metal design with iconic octagonal bezel
- This model features a blue metallic vapor deposition dial that is complemented by a black band made of environmentally responsible bio-based resin
What functions does the DWN-5600 retain?
Despite its ring-sized case, Casio lists the following digital-watch functions:
- Time display and calendar with an auto-calendar
- Dual time
- Stopwatch measuring to 1/100 second
- 12- or 24-hour time format
- LED backlight and pulsing light
Casio cautions that the LED backlight may not be visible in bright light. The familiar 5600-style face includes a lower time display; an indicator shows DT or ST according to the selected mode.
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- Case size (L× W× H): 48.5 × 45.4 × 11.8 mm
- Case and bezel material: Carbon / Resin
- Construction: Shock Resistant, Carbon Core Guard structure | Band: resin band
- Weight: 51 g
- Water resistance: 200-meter water resistance
What is the difference between the Casio CRW-001 and DWN-5600?
Both are ring-sized watches, but their construction and stated durability specifications differ. Casio identifies the CRW-001 as its earlier full-metal ring watch, while the DWN-5600 carries the G-SHOCK 5600 design in a resin band and is specified as shock resistant.
| Feature | DWN-5600 G-SHOCK Nano | CRW-001 CASIO RING WATCH |
|---|---|---|
| Construction and fit | Glass-fiber-reinforced resin case, urethane bezel and adjustable resin band with holes (Casio) | Full-metal design; supplied with two size-adjusting spacers (Casio) |
| Shock resistance | Specified as shock resistant by Casio | Not presented as a shock-resistant G-SHOCK in the cited Casio sources |
| Water resistance | 20 bar; Casio’s English page says up to 200 meters | 3 bar (Casio product-planning interview) |
| Design | Miniature version of the square 5600 G-SHOCK look | Casio’s earlier ring-watch design |
Sources: Casio DWN-5600 specifications, Casio product-planning interview and Casio CRW-001 product page.
Rank #4
- Shock-Resistant Durability: Built to withstand the toughest conditions, this G-Shock watch features a rugged resin case and bezel, perfect for outdoor adventures and extreme sports.
- 200M Water Resistance: Designed for water enthusiasts, it’s suitable for scuba diving, swimming, and snorkeling, providing reliable protection up to 200 meters.
- Electro-Luminescent Backlight: The blue-green EL backlight with afterglow ensures clear visibility of the time, day, and date, even in complete darkness.
- Precision Stopwatch & Countdown Timer: Measure elapsed and split times with the 1/100-second stopwatch, or set up a countdown timer with up to a 24-hour range, ideal for timing workouts or daily tasks.
- Multi-Alarm with Flash Alert: Stay on schedule with a customizable alarm, hourly chime, and flash alert that combines light and sound for added convenience.
When did the DWN-5600 come out?
Casio announced the DWN-5600 on October 21, 2025, and scheduled its Japanese release for November 8, 2025. Those are announcement and Japan launch dates; they do not establish current availability or release timing in other markets. The announcement described black, red and yellow variants for Japan. Casio’s Japan announcement
Can the DWN-5600 be worn anywhere besides a finger?
The strap adjusts through holes, and Casio’s product planner suggested attaching the watch to a backpack or pencil-case zipper, or wearing it as a pendant. These are designer-suggested alternatives, not separately tested use cases. Casio says the screw-on case back allows battery replacement. The watch is also supplied with special packaging that includes a silicone display stand shaped like the G mark.
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