CASIO · JAPANESE-MARKET REFERENCE

AQ-S820W-3BJF

Name: AQ-S820W-3BJF
Brand: CASIO
SKU: AQ-S820W-3BJF
Price: 8508.0 JPY
Availability: OutOfStock

¥8,508 JPY

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CASIO AQ-S820W-3BJF is a Japanese-market reference. The resin case and bezel are paired with a resin band. Tough Solar (solar charging system). Features include world time. Listed water resistance: 10-bar water resistance.

Reference: AQ-S820W-3BJF
Case (H × W × D): 52.5 × 50.1 × 12.7 mm
Weight: 46 g
Listed water resistance: 10-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 Japan Size & function guide

Setup & support

Model reference: AQ-S820W-3BJF

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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: AQ-S820W-3BJF
JAN / EAN: 4549526409677
Intended use: Wristwatch
Band material: Resin band
Crystal material: Resin glass
Weight: 46 g
Case size (L × W × H): 52.5 × 50.1 × 12.7 mm
Price: ¥8,508 JPY
Country of origin: JP

Specifications

Release date	September 2025
Japan MSRP	Japan MSRP: ¥7,700 (including Japanese tax)
Case size (H × W × D)	52.5 × 50.1 × 12.7 mm
Weight	46 g
Case and bezel material	Resin
Band	Resin band
Water resistance	10-bar water resistance
Power supply and battery life	Tough Solar (solar charging system)

Exterior details

Glass	Resin glass
Compatible wrist size	145–215mm

Watch functions

World time	World time: 48 cities (31 time zones, daylight saving on/off) plus UTC (Coordinated Universal Time); home city / world time city swapping
Stopwatch	Stopwatch: 1/100 second, 60-minute capacity, split time
Timer	Interval timer with up to 2 time settings: 5-second setting increments, maximum 99 minutes 55 seconds, 1-second measurement; repetition count selectable from 1–10
Alarm	5 daily alarms and hourly time signal
Light	LED backlight: afterglow, selectable illumination duration (1.5 seconds / 3 seconds)
Light color	LED: amber
Calendar	Full auto-calendar
Power saving	Power saving: turns off the display after a period in the dark
Battery indicator and alerts	Battery level indicator
Operating time	Operating time from a full charge without further solar charging
With normal functions in use: approximately 10 months
In power-saving mode: approximately 23 months
Accuracy	Accuracy: ±30 seconds per month
Other features	12/24-hour format; day display in 6 languages (English, Portuguese, Spanish, French, German, Italian)
Button operation tone	Button operation tone on/off