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Japan : 4/23 19:55   EN
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Order within 4 Hours 4 mins with Scheduled Delivery. If you place an order within this time, We will ship on Monday, Apr 27 2026 This delivery time is calculated by DHL and FedEx. You can check the exact delivery date on checkout page.

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Full refund if not genuine. Full or partial refund, if the new item is not as described.

     Description (6,320 characters)
From G-SHOCK, which has continued to pursue toughness since its birth in 1983, we are introducing the Master of G MUDMASTER FLAGSHIP model, which is equipped with a strong exterior made of metal parts and achieves high durability and wearability.

[Shockproof structure & 20 ATM waterproof] Adopts a shockproof structure that is resistant to shock and vibration.
Also equipped with 20 ATM water resistance, allowing use in a variety of locations and situations.

[Dustproof/mudproof structure] Dustproof/mudproof structure prevents sand, mud, dust, etc. from entering and ensures reliable operation even in poor environments.

[Radio clock] Accurate time can be displayed by receiving radio waves carrying time information.

[Other product specifications] Please check the description column

From G-SHOCK, which has continued to pursue toughness since its birth in 1983, this Master of GMUDMASTER FLAGSHIP model is equipped with a strong exterior made of metal parts and achieves high durability and wearability.
Master of G is a line of G-SHOCK with enhanced tough functions that can withstand the harshest conditions.
Among these, MUDMASTER has earned high praise and trust from rangers and rescue teams working in extreme environments as a tough watch designed for use in harsh environments where debris and dirt are piled up and scattered.
This GWG-B1000 has a case with a carbon core guard structure, and is a model that combines a carbon fiber reinforced resin case with high strength and durability with a metal material made using high precision forging technology.
In terms of functionality, it is equipped with a triple sensor in addition to radio solar, and can obtain information on direction, pressure/altitude, and temperature.
Double LED lights, sapphire glass, etc. ensure high visibility and time readability.
In addition, it is equipped with a location indicator function that allows you to set an arbitrary point in the app and the indicator hand at the 3 o'clock position will always point in that direction.
Supports user actions even when visibility is obstructed by sandstorms etc.
The case, part of the bezel, and the band are made of biomass plastic, making them environmentally friendly.
Introducing MUDMASTER, which has improved functionality and wearability with carbon core guard technology and metal exterior made with high-precision forging technology.

・Shock-resistant structure
・ Earthquake-resistant structure
・ Dustproof/mudproof structure
・ Tough Solar (solar charging system)
・20 ATM waterproof function
・ Radio reception function: automatic reception (up to 6 times/day) (up to 5 times/day for Chinese radio waves) / manual reception, <Japan> reception radio waves: JJY, frequency: 40k Hz / 60k Hz (both Fukushima / Kyushu) Station compatible model) <North America> Received radio waves: WWVB, frequency: 60kHz <European area> Received radio waves: MSF/DC F77, frequency: 60kHz / 77.5kHz <China> Received radio waves: BPC, frequency: 68.5kHz*Home If you set the time setting to a receivable city, you will receive stations tailored to your city.
Please note that the time difference is set by the selected city or time zone.

・Mobile link function (function linked with compatible mobile phones via B luetooth ® communication)
・Automatic needle position correction function
- Needle retraction function (manual, automatic (when measuring altitude, atmospheric pressure, temperature))
- Direction measurement function: Measures 16 directions and angles of direction (0 to 359°), continuous direction measurement (60 seconds), north direction pointer function, bearing memory function, automatic horizontal correction function, magnetic declination correction function, direction correction function
- Barometric pressure measurement function (measurement range: 260 to 1,100hPa, in 1hPa units), barometric pressure trend graph display (displays the past 20 hours), barometric pressure difference indicator (±10h Pa), barometric trend information alarm (characteristic barometric pressure If a change occurs, we will notify you with an arrow and a sound) *The atmospheric pressure trend graph can be changed to measurement every 30 minutes.
In that case, it is the past 5 hours.

・Altitude measurement function/Relative altimeter (measurement range: -700 to 10,000m, in 1m increments), altitude memory (manual memory of up to 30 measurement date, time, and altitude), automatically recorded data (highest/lowest altitude, Auto integration (ascent/descent memory), altitude trend graph, altitude difference indicator (±100m/±1000m), measurement interval setting function (every 5 seconds/2 minutes) *Every second for the first 3 minutes only
・Temperature measurement function (measurement range: -10 to 60℃, 0.1℃ increments)
・World Time: 55 cities around the world (38 time zones, automatic summer time setting function) + UTC (Coordinated Universal Time) time display, home time city switching function, UTC direct call function
・Sunrise/sunset time display ・Stopwatch (1/100 second, 24-hour meter, with split)
・ Timer (set unit: 1 minute, maximum set: 60 minutes, measured in 1 second increments)
・5 time alarms/time signal
・Battery indicator display
- Power saving function (in a dark place, the display turns off after a certain period of time and the hands stop moving to save power)
・Full auto calendar
・12/24 hour display switching
・ Operation sound ON/OFF switching function
・Double LED light: LED light for dial (with full auto light, afterglow function, afterglow time switching (1.5 seconds/3 seconds)), LED backlight for LCD section (full auto light, afterglow function, afterglow time switching) (with 1.5 seconds/3 seconds)
・When using the drive time function without solar power generation from full charge: Approximately 6 months When using power saving mode: Approximately 24 months


Tags:

Casio  Sapphire Crystal  Black  G-Shock Master of G MUDMASTER GWG1000  国内ブランド  56mm  


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CASIO G-SHOCK MUDMASTER GWG-B1000-1A4JF 4549526361890 From G-SHOCK, which has continued to pursue toughness since its birth in 1983, we are introducing the Master of G MUDMASTER FLAGSHIP model, which is equipped with a strong exterior made of metal parts and achieves high durability and wearability.

[Shockproof structure & 20 ATM waterproof] Adopts a shockproof structure that is resistant to shock and vibration.
Also equipped with 20 ATM water resistance, allowing use in a variety of locations and situations.

[Dustproof/mudproof structure] Dustproof/mudproof structure prevents sand, mud, dust, etc. from entering and ensures reliable operation even in poor environments.

[Radio clock] Accurate time can be displayed by receiving radio waves carrying time information.

[Other product specifications] Please check the description column

From G-SHOCK, which has continued to pursue toughness since its birth in 1983, this Master of GMUDMASTER FLAGSHIP model is equipped with a strong exterior made of metal parts and achieves high durability and wearability.
Master of G is a line of G-SHOCK with enhanced tough functions that can withstand the harshest conditions.
Among these, MUDMASTER has earned high praise and trust from rangers and rescue teams working in extreme environments as a tough watch designed for use in harsh environments where debris and dirt are piled up and scattered.
This GWG-B1000 has a case with a carbon core guard structure, and is a model that combines a carbon fiber reinforced resin case with high strength and durability with a metal material made using high precision forging technology.
In terms of functionality, it is equipped with a triple sensor in addition to radio solar, and can obtain information on direction, pressure/altitude, and temperature.
Double LED lights, sapphire glass, etc. ensure high visibility and time readability.
In addition, it is equipped with a location indicator function that allows you to set an arbitrary point in the app and the indicator hand at the 3 o'clock position will always point in that direction.
Supports user actions even when visibility is obstructed by sandstorms etc.
The case, part of the bezel, and the band are made of biomass plastic, making them environmentally friendly.
Introducing MUDMASTER, which has improved functionality and wearability with carbon core guard technology and metal exterior made with high-precision forging technology.

・Shock-resistant structure
・ Earthquake-resistant structure
・ Dustproof/mudproof structure
・ Tough Solar (solar charging system)
・20 ATM waterproof function
・ Radio reception function: automatic reception (up to 6 times/day) (up to 5 times/day for Chinese radio waves) / manual reception, <Japan> reception radio waves: JJY, frequency: 40k Hz / 60k Hz (both Fukushima / Kyushu) Station compatible model) <North America> Received radio waves: WWVB, frequency: 60kHz <European area> Received radio waves: MSF/DC F77, frequency: 60kHz / 77.5kHz <China> Received radio waves: BPC, frequency: 68.5kHz*Home If you set the time setting to a receivable city, you will receive stations tailored to your city.
Please note that the time difference is set by the selected city or time zone.

・Mobile link function (function linked with compatible mobile phones via B luetooth ® communication)
・Automatic needle position correction function
- Needle retraction function (manual, automatic (when measuring altitude, atmospheric pressure, temperature))
- Direction measurement function: Measures 16 directions and angles of direction (0 to 359°), continuous direction measurement (60 seconds), north direction pointer function, bearing memory function, automatic horizontal correction function, magnetic declination correction function, direction correction function
- Barometric pressure measurement function (measurement range: 260 to 1,100hPa, in 1hPa units), barometric pressure trend graph display (displays the past 20 hours), barometric pressure difference indicator (±10h Pa), barometric trend information alarm (characteristic barometric pressure If a change occurs, we will notify you with an arrow and a sound) *The atmospheric pressure trend graph can be changed to measurement every 30 minutes.
In that case, it is the past 5 hours.

・Altitude measurement function/Relative altimeter (measurement range: -700 to 10,000m, in 1m increments), altitude memory (manual memory of up to 30 measurement date, time, and altitude), automatically recorded data (highest/lowest altitude, Auto integration (ascent/descent memory), altitude trend graph, altitude difference indicator (±100m/±1000m), measurement interval setting function (every 5 seconds/2 minutes) *Every second for the first 3 minutes only
・Temperature measurement function (measurement range: -10 to 60℃, 0.1℃ increments)
・World Time: 55 cities around the world (38 time zones, automatic summer time setting function) + UTC (Coordinated Universal Time) time display, home time city switching function, UTC direct call function
・Sunrise/sunset time display ・Stopwatch (1/100 second, 24-hour meter, with split)
・ Timer (set unit: 1 minute, maximum set: 60 minutes, measured in 1 second increments)
・5 time alarms/time signal
・Battery indicator display
- Power saving function (in a dark place, the display turns off after a certain period of time and the hands stop moving to save power)
・Full auto calendar
・12/24 hour display switching
・ Operation sound ON/OFF switching function
・Double LED light: LED light for dial (with full auto light, afterglow function, afterglow time switching (1.5 seconds/3 seconds)), LED backlight for LCD section (full auto light, afterglow function, afterglow time switching) (with 1.5 seconds/3 seconds)
・When using the drive time function without solar power generation from full charge: Approximately 6 months When using power saving mode: Approximately 24 months
82615
4549526361890 In Stock