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Order within 10 Hours 7 mins with Scheduled Delivery. If you place an order within this time, We will ship on Monday, May 11 2026 This delivery time is calculated by DHL and FedEx. You can check the exact delivery date on checkout page.

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     Description (4,460 characters)
Target: Men
Set contents: Body, box, instruction manual, warranty card are included in the instruction manual
Reinforced waterproof for daily life: 20BAR
Shock-resistant structure that resists shock and vibration
Smartphone link function (world time approx. 300 cities, alarm, timer, hand position correction, time change)
Mobile phone search function
Dual dial world time that can display the time of two cities simultaneously
Glass material (inorganic and mineral)
With calendar function * Full auto calendar
Dial digital &
analog
mass 185 g
radio wave reception function available
driving system solar product introduction G-STEEL's new model that opens up new grounds in metal design by fusing different materials from G-SHOCK, which continues to evolve in pursuit of toughness Appear
A new black and gold color lineup is added to the GST-W310D, a combination that achieved downsizing by downsizing the module, and the GST-B100D, which is the first analog display chronograph with a sense of texture and wearability.
In order to enhance the color of the dial, gold is used as an accent, using a light-shielding and distributed solar panel with excellent power generation efficiency.
Gold that shines brightly on the front screw with hour and minute hands, in-dial, index, and IP treatment
Combining black, which represents the brand color, with the gorgeous sparkle of gold, it has been designed to sublimate into a fertile face.
GST-W310D is equipped with multiband 6 compatible with standard radio waves from 6 stations around the world, and GST-B100D enables easy setting and automatic time adjustment by function linkage via Bluetooth communication with smartphones.
Equipped with a practical function to pursue accurate time display as a clock
G-STEEL with an edged stainless steel bezel and a wide range of variations, and a new model that embodies toughness design by adding gorgeous gold.
(This is GST-B100D-1A9JF
)
・ Shock-resistant structure
・ Tough solar (solar charging system)
・ 20 ATM water resistant function
・ Mobile link function
・ Dual time (with time change function for home time)
・ Stopwatch (1 second, 24 hours total, with split)
・ Timer (set unit: 1 minute, maximum set: 24 hours, measured in 1 second units)
-Time alarm-Battery indicator display-Power saving function (In a dark place, when a certain amount of time has passed, the hand movement is stopped to save power)
・ Date and day display
・ Fully automatic calendar
・ LED light (with super illuminator and afterglow function)
・ Driving time without solar power generation from full charge: When using functions / Approx. 5 months, When saving power / Approx. 24 months * When not linked with a smartphone, normal quartz accuracy (average monthly difference ± 15 seconds)
* Bluetooth is a registered trademark of Bluetooth SIG, Inc.
* "IPhone"
is a trademark or registered trademark of Apple Inc. registered in the United States and other countries.
* "Android"
and "Android logo"
are trademarks or registered trademarks of Google Inc.
* Other company names and product names are trademarks or registered trademarks of each company.
* GST-B100D is certified by the Japanese Radio Law.
* The smartphone link function depends on the specifications of the mobile phone body and the service of the telecommunications carrier in the country of use.
Brand introduction G-SHOCK has built a new concept of toughness on watches.
It all started with a developer's passion for creating a watch that would not break even if dropped, and a reckless challenge that overturned the common sense of the time.
Over 200 prototypes have been repeated, and about two years have been spent, and the shock-resistant structure has been completed.
It is the birth of technology to play the core of toughness
Since then, G-SHOCK has continued to evolve endlessly
Structure, material, function
Pursuing further toughness in every aspect

Model Number: GST-B100D-1A9JF
GROUP: GST-B100D

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CASIO G-SHOCK G-STEEL Smartpho... 4549526171062 Target: Men
Set contents: Body, box, instruction manual, warranty card are included in the instruction manual
Reinforced waterproof for daily life: 20BAR
Shock-resistant structure that resists shock and vibration
Smartphone link function (world time approx. 300 cities, alarm, timer, hand position correction, time change)
Mobile phone search function
Dual dial world time that can display the time of two cities simultaneously
Glass material (inorganic and mineral)
With calendar function * Full auto calendar
Dial digital &
analog
mass 185 g
radio wave reception function available
driving system solar product introduction G-STEEL's new model that opens up new grounds in metal design by fusing different materials from G-SHOCK, which continues to evolve in pursuit of toughness Appear
A new black and gold color lineup is added to the GST-W310D, a combination that achieved downsizing by downsizing the module, and the GST-B100D, which is the first analog display chronograph with a sense of texture and wearability.
In order to enhance the color of the dial, gold is used as an accent, using a light-shielding and distributed solar panel with excellent power generation efficiency.
Gold that shines brightly on the front screw with hour and minute hands, in-dial, index, and IP treatment
Combining black, which represents the brand color, with the gorgeous sparkle of gold, it has been designed to sublimate into a fertile face.
GST-W310D is equipped with multiband 6 compatible with standard radio waves from 6 stations around the world, and GST-B100D enables easy setting and automatic time adjustment by function linkage via Bluetooth communication with smartphones.
Equipped with a practical function to pursue accurate time display as a clock
G-STEEL with an edged stainless steel bezel and a wide range of variations, and a new model that embodies toughness design by adding gorgeous gold.
(This is GST-B100D-1A9JF
)
・ Shock-resistant structure
・ Tough solar (solar charging system)
・ 20 ATM water resistant function
・ Mobile link function
・ Dual time (with time change function for home time)
・ Stopwatch (1 second, 24 hours total, with split)
・ Timer (set unit: 1 minute, maximum set: 24 hours, measured in 1 second units)
-Time alarm-Battery indicator display-Power saving function (In a dark place, when a certain amount of time has passed, the hand movement is stopped to save power)
・ Date and day display
・ Fully automatic calendar
・ LED light (with super illuminator and afterglow function)
・ Driving time without solar power generation from full charge: When using functions / Approx. 5 months, When saving power / Approx. 24 months * When not linked with a smartphone, normal quartz accuracy (average monthly difference ± 15 seconds)
* Bluetooth is a registered trademark of Bluetooth SIG, Inc.
* "IPhone"
is a trademark or registered trademark of Apple Inc. registered in the United States and other countries.
* "Android"
and "Android logo"
are trademarks or registered trademarks of Google Inc.
* Other company names and product names are trademarks or registered trademarks of each company.
* GST-B100D is certified by the Japanese Radio Law.
* The smartphone link function depends on the specifications of the mobile phone body and the service of the telecommunications carrier in the country of use.
Brand introduction G-SHOCK has built a new concept of toughness on watches.
It all started with a developer's passion for creating a watch that would not break even if dropped, and a reckless challenge that overturned the common sense of the time.
Over 200 prototypes have been repeated, and about two years have been spent, and the shock-resistant structure has been completed.
It is the birth of technology to play the core of toughness
Since then, G-SHOCK has continued to evolve endlessly
Structure, material, function
Pursuing further toughness in every aspect

Model Number: GST-B100D-1A9JF
GROUP: GST-B100D
4458
4549526171062 In Stock