Description
Casio announced the MR-G MRG-D5000 on 1 October 2026: a square G-Shock whose bezel and outer case are machined from blue sapphire crystal, limited to 20 pieces worldwide and priced at USD 80,000. It is the most expensive G-Shock ever made, and the flagship of what Casio calls the Blue Rose Project, launched alongside two far more attainable siblings.
The number is the headline, but the engineering problem is the interesting part. Sapphire is harder than steel and almost as brittle as glass: it does not tolerate the stress concentrations that screws create. Casio's answer was to build the outer case from multiple separate sapphire components that interlock without any screws at all — a structure it calls the Multi-Guard Structure for Sapphire, explicitly modelled on Japanese timber-frame joinery.
Design
The shape is the 5000-series square that has been G-Shock's signature since 1983, rendered almost entirely in transparent blue. The sapphire outer case and bezel sit over an inner structure of DLC-coated grade 5 titanium, and the screw-lock caseback is titanium with a sapphire insert, engraved with the piece number from 1/20 to 20/20 and the words "DREAM PROJECT."
The dial beneath the negative LCD is stainless steel with a blue PVD finish and the brick pattern that recurs through the MR-G line, with "MR-G" and "SHOCK RESIST" applied in 24K gold. The strap is Dura Soft rubber carrying the same raised brick texture, fitted to a newly milled titanium three-fold clasp with a release button. Note that the strap is cut to fit rather than resized conventionally. The case measures 51.1 × 43.2 × 16.5mm and the whole watch weighs 121g.
Specifications
- Reference: MRG-D5000 (styled MRGD5000 by some outlets)
- Case: Multi-piece blue sapphire crystal outer case and bezel, assembled without screws, over a DLC-coated grade 5 titanium inner structure
- Caseback: Screw-lock grade 5 titanium with sapphire insert, engraved 1/20–20/20 and "DREAM PROJECT"
- Dimensions: 51.1 × 43.2 × 16.5mm
- Weight: 121g
- Power: Gallium Tough Solar — approx. 11 months normal use, approx. 22 months in darkness with power saving
- Functions: Multi Band 6 radio-controlled timekeeping, world time (38 cities, 5 selectable zones), 1/100-second stopwatch, countdown timer, 5 daily alarms with snooze, full-auto calendar, full-auto LED backlight, negative LCD
- Water resistance: 200m (20 bar)
- Dial: Stainless steel with blue PVD and brick pattern; 24K gold lettering
- Strap: Dura Soft rubber, cut-to-fit, with milled titanium three-fold clasp
- Limited edition: 20 pieces worldwide, individually numbered
- Price: USD 80,000 — Casio itself publishes no price, and outlets differ; see the note below
- Availability: Japan from December 2026; United States staggered December 2026 to June 2027, sold by registration
What's Exciting
The screwless construction is a real piece of problem-solving rather than a marketing line. Every screw boss in a conventional G-Shock case is a point where force concentrates, which is exactly what you cannot have in sapphire — it would crack rather than deform. Borrowing from kigumi, the Japanese joinery tradition of interlocking timber without fasteners, lets the components hold each other in compression instead. That the result still carries 200m water resistance and the shock-resistant designation is the genuinely impressive claim.
It is also worth noting what the Blue Rose Project is as a whole. The MRG-D5000 is the unobtainable halo piece, but Casio launched it next to the MRG-B5000SA and the GMW-B5000SB, which land at a small fraction of the price and bring some of the same visual language down to earth. Reading the USD 80,000 watch in isolation misses that structure.
Two cautions. First, pricing: Casio's own newsroom and product pages publish no price at all, and its US page says terms remain subject to confirmation. USD 80,000 is the figure reported by aBlogtoWatch, HiConsumption and Gear Patrol, but WatchTime has quoted roughly USD 90,000, so treat the number as reported rather than official. Second, the movement: Casio does not publish a module number for this watch, and the figures circulating are outlet speculation rather than confirmed specification. Six of the 20 pieces are reported to be earmarked for the United States, though Casio has not published a regional breakdown itself.
History
MR-G is the top of the G-Shock hierarchy, introduced in 1996 as the line's first all-metal watch and reserved since then for titanium, Dura Soft and finishing work done at Casio's Yamagata factory in northern Japan, where this watch is hand-assembled. 2026 is the MR-G line's 30th anniversary.
The square 5000 case goes back to the original DW-5000C of 1983, and Casio has returned to it for its most extreme experiments ever since — most notably the Dream Project series, which produced an 18K gold G-D5000-9 in 2019 in 35 examples at USD 70,000. That was the most expensive G-Shock until this one. The sapphire MRG-D5000 continues the same lineage: take the cheapest-looking shape in the catalogue and build it from the most difficult material available.
