*The color tone of the listed products may differ from the actual product in some cases.
MTG-B4000-1A
This product is excluded from voucher codes. Introducing the cutting-edge fusion of form and function with the MTG-B4000 where advanced metal components merge with the original G-SHOCK resin to redefine rugged sophistication. The MTG-B4000 presents a next-generation Dual Core Guard structure, crafted with the support of artificial intelligence and a reimagined frame design that artfully blends carbon fibre and stainless steel. This revolutionary exterior sets a new standard, balancing durability and elegance in a bold design evolution. Blending AI innovation with expert human craftsmanship, this watch embodies a seamless integration of material, architecture, and aesthetic. Designers developed the base form, which was then enhanced through AI simulations to produce an optimised 3D structure—ultimately refined by hand to create a timepiece that unites functional performance with organic beauty. The frame’s dynamic, multi-dimensional shape is precision-cut from laminated carbon and glass fibre sheets, revealing a striking, layered visual. The stainless steel bezel components are meticulously finished with both hairline and mirror polishing, achieving a sophisticated and tactile contrast. Engineered with Triple G Resist technology, the MTG-B4000 stands resilient against shock, centrifugal force, and vibration. The case back, crafted via metal injection moulding (MIM), adds structural depth and reinforces its robust character. Every detail is considered—from the high-clarity sapphire crystal to the finely crafted dial, produced using advanced processing techniques at Yamagata Casio. Built to perform as impressively as it looks, the MTG-B4000 offers smart connectivity via the CASIO WATCHES app, Bluetooth® pairing, Multiband 6 radio control, Tough Solar charging, and a high-brightness LED light. This is more than a timepiece—it’s a statement of technological artistry, ready to accompany you on any adventure.
Features
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Made in Japan
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Shock resistant
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20 bar water resistant
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Keeps yourself in time
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Stable solar power
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Easy to operate via smartphone
Specifications
FEATURES
Co-creating with AI to break new ground in toughness-driven design: Original new structure incorporating a frame made with a combination of materials
The structure and exterior design were developed collaboratively by human designers and AI, creating a bold new frame that integrates carbon fiber and metal materials. Paired with the Dual Core Guard structure, this innovation further elevates MT-G toughness and cutting-edge design. A novel approach integrates band connection parts directly into the frame, effectively reducing shock transmission to the case through a hybrid carbon-metal structure. To further enhance impact resistance, a screwless design securely attaches the metal lug components to the carbon frame, ensuring exceptional durability and resilience.
AI-assisted development process
AI was used to analyze and simulate base designs created by human designers. Drawing on the extensive data on shock-resistant structures in the G-SHOCK world, optimized 3D prototypes were generated to meet specified structural strength and material property requirements. These prototypes were further refined via repeated manual adjustments, achieving unique forms that seamlessly combine functionality and beauty.
Multi-layered carbon frame design for a side view exuding strength and beauty
The frame is cut out from a base material consisting of laminated carbon and glass fiber sheets to create its intricate, dimensional form. The beautiful layered patterns created by the pair of different materials are incorporated as a design feature. Configured to interlock with the bezel, side buttons, and case back, it offers a beautiful side view accentuating the combination of materials.
* The exact pattern on the bezel will vary by watch due to the characteristics of the molding technique, which mixes carbon fibers, resin, and other materials.
Meticulous metal finishing for a solid luster
Sallaz polishing is applied to certain mirror-polished surfaces to create smooth, beautiful, distortion-free finishes. Separate hairline and mirror finishes applied to individual components accentuate the beauty of the metal with looks of luxe refinement.
Metal injection molding (MIM), a method of metal processing in which fine metal powder is injected into molds, is used to create the intricate dimensional case back.
Newly developed blue-gray IP is applied to the MTG-B4000B.
DETAILS
Multi-layer dial projecting sophisticated refinement
The design incorporating three-dimensional arrangements of components, including a slanted dial ring set off with large, boldly raised indexes, gives the watch an impressive sense of depth. Phosphorescent finish and metallic vapor deposition are applied to the sharp, multifaceted forms of the indexes. Achieved with the fine processing technologies of Yamagata Casio, the intricate forms of the components accent the watch with sophisticated textural appeal down to the finest details.

TRIPLE G RESIST Passion for delivering further strength
The updated MT-G Dual Core Guard structure protects the carbon fiber-reinforced resin inner case with metal components, delivering high strength and weight reduction at the same time. The innovative construction meets stringent G-SHOCK standards, providing protection from shock, centrifugal force, and vibration with Triple G Resist technology.

Solar-powered timekeeping with Bluetooth® and radio control for enhanced accuracy and reliability

Super Illuminator (high-brightness LED light) for maintaining watch readability in the dark
*Image shows the MTG-B4000B-1A2.

Scratch-resistant, highly transparent sapphire crystal with an anti-reflective coating
