Casio's new high-in-demand GBX-H5600 watches with fitness tracking now available to buy
Casio has now officially made the G-Shock GBX-H5600 series available to buy in Japan — this is a major launch too, since it's the first G-LIDE model in the brand's surf-oriented sub-line to feature an optical heart rate monitor. The two variants, the GBX-H5600-1JR and GBX-H5600-2JR, are priced at ¥44,000 (tax included) each. However, demand has already outpaced supply: the blue GBX-H5600-2JR is currently out of stock on Casio's official online store, with only the black GBX-H5600-1JR still available to order.
Design and display
Both variants feature a semi-transparent see-through bezel with a carbon fiber reinforced resin center case — the watch weighs just 47 g at 51.1 × 44.5 × 17.3 mm. It uses a high-resolution MIP (Memory In Pixel) LCD with wide viewing angles and a high-contrast full-dot display capable of rendering the tide graph wave imagery associated with the G-LIDE line.
Fitness and outdoor features
The GBX-H5600 packs an optical heart rate sensor and a 3-axis accelerometer, which enables heart rate monitoring (30–220 bpm), sleep tracking with recovery analysis, blood oxygen measurement, step counting, breathing exercises, and detailed activity logging across running, walking, and gym workouts. Tide graph functionality covers up to 3,300 worldwide points when paired with a smartphone, alongside sunrise/sunset times and moon phase data.
Connectivity and battery
The watch connects via Bluetooth to the Casio Watches app. Doing so lets you access notifications, GPS-assisted distance correction, training analysis, and world time for around 300 cities. Power comes from a hybrid USB and solar charging system, and battery life ranges from 35 hours with heart rate active to up to 11 months in power-saving mode. Water resistance is rated at 20 BAR.
Availability
The GBX-H5600 series is now live on Casio's Japan website at ¥44,000 (approx. $277). As mentioned earlier, the blue variant is already sold out, with no restock date announced just yet.
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