{"product_id":"casio-g-shock-mt-g-mtg-b4000b-1ajf-jdm-black-ip-carbon-bluetooth-solar-mens-watch","title":"CASIO G-SHOCK MT-G MTG-B4000B-1AJF JDM Black IP Carbon Bluetooth Solar Men's Watch","description":"\u003ch2 data-section-id=\"1phovsz\" data-start=\"445\" data-end=\"463\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"448\" data-end=\"463\"\u003eDescription\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"465\" data-end=\"959\"\u003eThe CASIO G-SHOCK MT-G MTG-B4000B-1AJF represents a new chapter in the evolution of structural toughness by combining carbon engineering with premium metal finishing. Developed using an AI-assisted design process, the MTG-B4000 series introduces an advanced Dual Core Guard structure that integrates carbon and metal into a newly engineered framework. The bold Black IP treatment and red accent details create a more aggressive and sport-oriented identity. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"961\" data-end=\"1407\"\u003ePowered by Tough Solar technology with Bluetooth connectivity and Multi Band 6 Radio Controlled time synchronization, the watch minimizes maintenance while maximizing long-term precision. The carbon laminated frame and lightweight resin band improve comfort while preserving MT-G durability standards. TRIPLE G RESIST technology further reinforces protection against impact, vibration, and centrifugal force. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1409\" data-end=\"1768\"\u003eDesigned for users seeking premium G-SHOCK engineering without excessive weight, the MTG-B4000B-1AJF offers a substantial visual presence with enhanced daily wearability. Community impressions frequently note that it feels lighter than expected while maintaining the strong wrist presence associated with the MT-G lineup. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"10od2gs\" data-start=\"1770\" data-end=\"1795\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1773\" data-end=\"1795\"\u003eKey Specifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1797\" data-end=\"3119\"\u003e\n\u003cli data-section-id=\"53fyie\" data-start=\"1797\" data-end=\"1924\"\u003eCase: 56.6 × 45.3 × 14.4 mm, 112g, carbon fiber reinforced resin \/ metal construction \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"6muz07\" data-start=\"1925\" data-end=\"2010\"\u003eBezel: Stainless steel with Black IP finish \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1o9c8z9\" data-start=\"2011\" data-end=\"2088\"\u003eBand: Soft resin band, buckle clasp \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9q0rst\" data-start=\"2089\" data-end=\"2162\"\u003eWater resistance: 20 ATM (200m) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"i0nvth\" data-start=\"2163\" data-end=\"2270\"\u003eMovement: Tough Solar + Bluetooth + Multi Band 6 Radio Controlled \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9rjjwd\" data-start=\"2271\" data-end=\"2396\"\u003eBattery\/Power: Solar rechargeable system, approx. 5 months \/ 18 months power saving \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"jk35o2\" data-start=\"2397\" data-end=\"2490\"\u003eAccuracy: ±15 sec\/month (without synchronization) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1pr8nph\" data-start=\"2491\" data-end=\"2527\"\u003eDisplay: Analog multi-layer dial\u003c\/li\u003e\n\u003cli data-section-id=\"1wgnp3g\" data-start=\"2528\" data-end=\"2653\"\u003eFunctions: World Time, Stopwatch, Timer, Alarm, Mobile Link, Auto Time Correction \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"e392hj\" data-start=\"2654\" data-end=\"2795\"\u003eSpecial features: TRIPLE G RESIST, Dual Core Guard, Carbon Laminated Frame, Bluetooth Mobile Link \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"86ew1c\" data-start=\"2796\" data-end=\"2883\"\u003eIllumination: Super Illuminator LED (white) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1etsez6\" data-start=\"2884\" data-end=\"2980\"\u003eGlass: Sapphire crystal with anti-reflective coating \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1e7fafu\" data-start=\"2981\" data-end=\"3020\"\u003eOrigin: Japan Domestic Market (JDM)\u003c\/li\u003e\n\u003cli data-section-id=\"x41ok6\" data-start=\"3021\" data-end=\"3052\"\u003eModel Code: MTG-B4000B-1AJF\u003c\/li\u003e\n\u003cli data-section-id=\"1pvl98h\" data-start=\"3053\" data-end=\"3119\"\u003eRelease date: May 2026 \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1qkotip\" data-start=\"3121\" data-end=\"3142\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3124\" data-end=\"3142\"\u003eKey Highlights\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"3144\" data-end=\"3448\"\u003eThe MTG-B4000B-1AJF stands out through its AI-assisted structural design and carbon fusion architecture. Compared with traditional metal-focused MT-G models, it delivers a stronger emphasis on lightweight performance while maintaining premium construction quality. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3450\" data-end=\"3700\"\u003eIts Bluetooth Solar and Radio Controlled functionality reduce maintenance needs while delivering dependable timekeeping. The integrated smartphone connection and Tough Solar system enhance everyday convenience. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3702\" data-end=\"3987\"\u003eOn the wrist, the lightweight resin band significantly improves comfort while preserving a bold MT-G presence. User feedback frequently highlights that the watch feels lighter than expected and wears more comfortably than its dimensions suggest. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3989\" data-end=\"4160\"\u003eWithin the MT-G collection, the MTG-B4000B-1AJF offers one of the strongest balances of structural innovation, lightweight wearability, and next-generation G-SHOCK design.\u003c\/p\u003e","brand":"CASIO","offers":[{"title":"Default Title","offer_id":48553484091647,"sku":"MTG-B4000B-1AJF","price":184200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/0561\/5871\/files\/mtg-b4000b-1ajf_1.jpg?v=1779278824","url":"https:\/\/japanheartfulstore.com\/products\/casio-g-shock-mt-g-mtg-b4000b-1ajf-jdm-black-ip-carbon-bluetooth-solar-mens-watch","provider":"Japan Heartful Store","version":"1.0","type":"link"}