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CASIO · JAPANESE-MARKET REFERENCE

GBX-100SFJ-1JR

GBX-100SFJ-1JR

¥31,388 JPY
¥31,388 JPY
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Taxes included. Shipping calculated at checkout.

This G-SHOCK collaboration with Surfrider Foundation Japan combines a solid-black design with functions for time at the coast. A tide graph and sunlight-readable MIP display support surfing use. The foundation's logo is subtly incorporated into the dark finish, and the band keeper carries the #oceanfriendlylifestyle message. Luminous paint in the bezel markings adds visibility after dark. Major resin components in the bezel and band use bio-based resin.

Reference
GBX-100SFJ-1JR
Case (H × W × D)
50.9 × 46 × 14.7 mm
Weight
66 g
Listed water resistance
20-bar water resistance

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Before & after your purchase

Read our shipping and return information before ordering. Model-specific warranty and repair guidance is available below.

Buying from JapanSize & function guide
Setup & support

Model reference: GBX-100SFJ-1JR

Search the official manual using this model or the module number on your watch.

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Warranty & service

Local warranty service outside Japan is not guaranteed. Read our return and repair policy and ask about your exact reference before ordering.

Bracelet fit & adjustments

Check the case dimensions and band details in the specifications. Ask us about fit, included links and adjustment options before placing an order.

Packaging & included items

Included items can vary by reference. Contact us with the model number to confirm the box, documents and accessories.

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Product details
Model
GBX-100SFJ-1JR
JAN / EAN
4549526425011
Band material
Resin band
Crystal material
Mineral glass
Weight
66 g
Case size (L × W × H)
50.9 × 46 × 14.7 mm
Price
¥31,388 JPY
Country of origin
JP

Specifications

Release date June 2026
Case size (H × W × D) 50.9 × 46 × 14.7 mm
Weight 66 g
Case and bezel material Resin / bio-based resin / stainless steel
Band Soft urethane band (bio-based resin)
Construction Shock resistant
Water resistance 20-bar water resistance
Time adjustment Bluetooth: connects to a smartphone for automatic time adjustment
Power supply and battery life Approx. battery life: 2 years
Sensors Training function: distance, speed, pace and other calculations using the accelerometer; automatic / manual laps; auto-pause; target alerts (time, calories burned) on/off; customizable training display (elapsed time, distance, pace, lap time, lap distance, lap pace, average pace, speed, average speed, calories burned)

Exterior details

Glass Mineral glass
Surface treatment Black ion plating (bezel)
Compatible wrist size 145–215mm

Watch functions

World time World time: 38 cities in 38 time zones plus UTC, with automatic daylight saving setting; Time-zone data may be updated through smartphone connectivity
Moon data Moon data: moon age and phase
Tide graph Tide graph: 3-level tide cycle display
Sunrise and sunset Sunrise / sunset times: choose from 50 preset locations worldwide or a user-defined location
Stopwatch Stopwatch: 1 second, 100-hour capacity, split time
Timer Interval timer with up to 5 time settings: 1-second setting increments, maximum 60 minutes, 1-second measurement, auto-repeat
Alarm 4 daily alarms with snooze
Light LED backlight: auto light, Super Illuminator, afterglow, selectable illumination duration (1.5 seconds / 3 seconds)
Light color LED: white
Calendar Full auto-calendar
Button operation tone Button operation tone on/off
Power saving Power saving: turns off the display at a set time each day
Accuracy Without smartphone connection, the watch operates at normal quartz accuracy (±15 seconds per month).
Other features 12/24-hour format; Airplane mode; Date and day display; User-profile settings; Vibration alerts; Operation vibration on/off; MIP LCD
Sensor notes Training logs: up to 100 runs with up to 140 lap records each, including measured time, distance, pace and calories; Life log: daily steps and monthly running distance
Mobile Link Bluetooth connectivity with a compatible smartphone; automatic connection
Compatible app CASIO WATCHES
App functions Automatic time adjustment; Easy watch settings; World time: approximately 300 cities; Notifications: calls, email, social updates, calendar and reminders; Activity log data; Life-log data; Distance correction using smartphone GPS; Tide graph settings: approximately 3,300 locations worldwide; Phone finder
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