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Casio announced the Japan-made MR-G MRG-D5000 on October 1, 2026, as a 20-piece worldwide edition. Its unusual feature is not simply blue sapphire decoration: Casio says sapphire components form part of a shock-resistant bezel-and-case structure. Casio America says six watches are allocated to the U.S., at an announced $80,000 each, with arrivals expected from December 2026 through June 2027.
How Casio designed a sapphire G-SHOCK for impact
Sapphire is hard and scratch-resistant, but it can crack under impact. Casio’s stated engineering challenge was to incorporate blue sapphire into a shock-resistant watch without treating it like an ordinary decorative stone.
Casio says the MRG-D5000 uses its Multi-Guard Structure for Sapphire: the bezel and case are built from separate components in a screwless arrangement. The company says it analyzed how impact forces travel to the sapphire and designed the multi-part structure to help protect it. The release describes this as the first G-SHOCK to use blue-sapphire components in a shock-resistant structure. These are Casio’s engineering claims; the cited launch materials do not include independent durability testing.
The caseback is screw-lock titanium with a sapphire insert, and each of the 20 watches has an individual serial number. Casio says the module uses Gallium Tough Solar. The U.S. product page explains that sapphire ingots take several months to produce and that makers select sections for color concentration and transparency before shaping components to resist chipping. It also says the construction draws inspiration from kigumi, traditional Japanese timber framing with interlocking joints.
#1 Best Overall
MRG-D5000 specifications
Casio’s international product listing gives these specifications:
| Specification | MRG-D5000 |
|---|---|
| Origin | Japan-made |
| Case dimensions | 51.1 × 43.2 × 16.5 mm |
| Weight | 121 g |
| Case and bezel materials | Titanium and sapphire crystal |
| Strap and clasp | Dura Soft rubber strap; one-touch three-fold clasp |
| Shock and water resistance | Shock resistant; 200-meter water resistance |
| Timekeeping and power | Radio-controlled Multi Band 6 time adjustment; Tough Solar |
Casio’s U.S. page also describes 24-karat gold lettering, a blue-finished brick-pattern dial, a model-specific Dura Soft strap, and a titanium clasp.
Rank #2
- The product video shows "fluorine elastomer band", but this product is a composite band (resin x fine resin with metal parts embedded). It also features a double locking one-push tri-fold clasp with an extension mechanism that allows you to easily adjust the band when wearing a wetsuit
- G-SHOCK "Frogman" series analog display model with ISO standard 200 m submersible waterproofing to support underwater missions
- Dive mode / Tide graph mode to support diving activities: Dive mode to show diving time and surface rest time. Tide graph mode displays tide information anywhere and current time in that city. Analog display of useful functions for diving activities
- Bluetooth Radio Solar: Support Bluetooth, standard radio wave time correction. Equipped with tough solar, it is stable to drive various functions
- Smartphone Link: Dedicated app allows you to easily set tide data around 3000 locations around the world in the app. You can also check the dive logs on your smartphone and enjoy the data measured on the watch side
Price, U.S. availability, and how registration works
The MRG-D5000 is not a broadly available release. Casio Computer Co., Ltd. announced 20 pieces worldwide. Separately, Casio America says six units are expected in the U.S. between December 2026 and June 2027, at an announced U.S. value/price of $80,000 each. That figure and allocation apply to the U.S.; Casio’s announcement does not establish a single global retail price.
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Casio’s U.S. campaign page invites people to register interest for a chance to purchase. Registration is not a purchase guarantee. The page says eligibility, availability, selection, and purchase timing are subject to final official terms; age, residency, registration dates, and other requirements are to be set out in those rules.
Rank #3
- Case size (L× W× H): 49.3 × 43.6 × 13 mm
- Customizable four display modes
How the MRG-D5000 differs from two sapphire-accented G-SHOCKs
Casio also announced two blue-sapphire-themed watches, but their use of sapphire, positioning, and announced U.S. prices differ substantially from the MRG-D5000.
| Model | How sapphire is used | Positioning and announced U.S. price | Edition and timing |
|---|---|---|---|
| MRG-D5000 | Blue sapphire components are incorporated into the bezel-and-case structure; Casio describes its Multi-Guard Structure as designed to protect sapphire from impact. | MR-G; Casio America announced $80,000 per U.S. unit. | 20 pieces worldwide; six U.S. units expected December 2026–June 2027. |
| MRG-B5000SA | Two-carat faceted blue sapphire crystals sit at the top and bottom of the case; the bezel uses a super-hard alloy. | MR-G; Casio America lists $6,600. | 500 pieces; U.S. availability begins November 2026. |
| GMW-B5000SB | Four blue sapphire stones are set at points on the front bezel of a full-metal G-SHOCK. | Full-metal G-SHOCK; Casio America lists $770. | Casio’s cited U.S. announcement does not state a run size; availability begins November 2026. |
Casio America says the MRG-B5000SA and GMW-B5000SB are expected through G-SHOCK, the G-SHOCK Soho Store, and select retailers beginning in November 2026. Unlike those sapphire-accented designs, Casio presents the MRG-D5000 as a watch whose sapphire is part of the structure intended to manage impact.
Quick Recap
Best Value
- Pursuing further toughness while inheriting the DNA of the first G-SHOCK model (DW5000) the GW5000U-1 is constructed with a solid metal case and a screw back
- This timepiece is also equipped with advanced technology, Multi-Band 6 that receives standard radio waves from 6 stations around the world
- Evolved from the G-SHOCK original design that was born in 1983, the GW5000U-1 is a discerning model that boasts technology and a high-quality finish.Case: 48.9 ? 42.8 ? 13.5 mmWeight: 74 gCase and bezel material: Stainless steel / ResinBand: Resin bandConstruction: Shock ResistantWater resistance:200-meter water resistanceTough Solar (Solar powered)Mineral GlassScrew Lock BackStopwatch: 1/100-second stopwatchTimer: Countdown timer; Measuring unit: 1 second; Countdown range: 24 hours; Countdown
Rank #4
- Enhance your style with some seriously sophisticated timekeeping from the 5000 line
- Directly descended from the first-ever G-SHOCK , the GMW-BZ5000 carries on the evolution of function and material in a transformative, unprecedented design
- They kept the iconic form of the original G-SHOCK, while developing a new structure that extends the case all the way to the lugs to even further mitigate shock transmission
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
