An innovative structure with original, functional beauty, co-created by people and AI
Published on 21 July 2025
The MT-G line of timepieces continues to evolve, inspired by the bold concept of bringing together diverse materials including metal, carbon fiber, and resin. This latest innovation, the MTG-B4000, features an updated Dual Core Guard structure. Developed with the aid of artificial intelligence, it combines carbon fiber and stainless steel in a completely new frame design. This unprecedented exterior achieves a new harmony of strength and elegance, pushing the frontiers of functional beauty. A seamless collaboration between human developers and AI capabilities, these watches creatively integrate materials, structure, and design into an organic whole, embodying the innovative spirit and distinctive aesthetic that define the MT-G line.
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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
SPECIFICATIONS
Multiple functions, all at your fingertips
CASIO WATCHES
(Smartphone app)
- Automatic time adjustment (four times a day)
- Easy watch setting
- World time (about 300 cities)
- Watch status display: Graphical display of time-reception status, solar power generation status, internal data update history and more.
- Self-check: Automatic evaluation of watch functions’ operational status. Displays a screen alert in the case of malfunction.
- Time & place: Pressing a button on the watch records the date, time and position on a map within the app. Useful as an activity log.
- Phone finder
Watch Functions
• Shock-resistant structure
• Centrifugal gravity resistance
• Vibration-resistant structure
• 20 bar water resistance
• Solar-powered
• Smartphone Link
• Radio-controlled (Multiband 6)
• Auto hand home position correction
• World time (27 cities)
• Stopwatch
• Countdown timer
• Alarm
• LED light (Super Illuminator)
• Date and day display
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. Any use of such marks and logos by Casio Computer Co., Ltd. is under license.