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In stock
mens
Casio Citizen 7 year warranty campaign
CASIO
【Genuine】 G Shock GA-100 SERIES
GA-100B-4AJF
18,700Yen
(tax included)
(tax included)
Retail price:18,700Yen
(tax included)
(tax included)
Inquiry Product ID: GA-100B-4AJF
Available areas(Kanto/Tokai/Kansai/Kyushu)
Store nameAvailable dates for visit
Tokyo Yukizaki Main Store
2026/04/08Ginza Yukizaki
2026/04/08Ginza Central Street Yukizaki
2026/04/08Kabukicho Yukizaki
2026/04/08Yukizaki in front of Midtown
2026/04/08Shibuya Yukizaki
2026/04/08Omotesando Yukizaki
2026/04/08Yokohama Motomachi Yukizaki
2026/04/08Nagoya Yukizaki Main Store
2026/04/08Osu Yukizaki
2026/04/08Nishiki Yukizaki
2026/04/08Kitashinchi Yukizaki
2026/04/08Shinsaibashi Yukizaki
2026/04/08Shinsaibashi Shopping Arcade Yukizaki
2026/04/08Kobe Yukizaki
2026/04/08Fukuoka Yukizaki Main Store
2026/04/08Fukuoka Yukizaki Select Building
2026/04/08Nakasu Yukizaki
2026/04/08Kumamoto Yukizaki
2026/04/08
*If you would like to visit on the day, please contact us via LINE or phone (10:30-19:30)
Contact Us
Payment and Returns
Payment and Returns
Payment method
About returns
We make every effort to ensure the quality and packaging of the products purchased by mail order, but if there is any damage or malfunction upon arrival, please contact us within 2 days.
Refund will be made only when unused.
In addition, we will not accept returns of used products for reasons other than the above, customer convenience, and used products.
We cannot accept returns or exchanges after adjusting the breath. Please note.
Refund will be made only when unused.
In addition, we will not accept returns of used products for reasons other than the above, customer convenience, and used products.
We cannot accept returns or exchanges after adjusting the breath. Please note.
Shopping loan simulation
*The simulation results are only an estimate and may differ from the actual repayment amount.
*You cannot set a repayment amount that is less than 3,000 yen per month.
*You cannot set a repayment amount that is less than 3,000 yen per month.
Sales price
Yendown payment
YenNumber of payments
No interest rate
timespayment(First time)
YenPayment amount (2nd and subsequent payments)
Yen * This page uses automatic translation. The product information may be incorrect. Please email us for accurate product information.
Casio 【Genuine】 CASIO G Shock GA-100 SERIES GA-100B-4AJF Description
This analog and digital combination model has a popular wide face. The matte-finished case and band are in G-SHOCK's brand colors of black and red. The dial features four LCD windows and a speed indicator laid out symmetrically, creating a clean face design. It also boasts high practicality, with a 1/1000-second stopwatch, speed measurement function, and JIS Class 1 magnetic resistance. This tough model stands out in the street fashion scene.
Other
Specifications Basic information Release date
August 2011 MSRP: ￥18,700 (tax included)
Case size (length x width x thickness)
icon-question
55 x 51.2 x 16.9 mm
mass
icon-question
70 g
Case and bezel material: Resin band: Resin band structure: Shock resistant (shock resist)
Antimagnetic watch (JIS Class 1)
Waterproof
Water resistance to 20 ATM Power supply and battery life Battery life: Approximately 2 years Exterior glass Inorganic glass Clock functions World time World time: Time display for 48 cities worldwide (29 time zones, daylight saving time setting function) + UTC (Coordinated Universal Time), Home city swap function Stopwatch Stopwatch (1/1000 seconds, 100 hour counter, speed measurement function (MAX1998 unit/h, 2 unit/h units), lap/split measurement switch)
Timer Timer (set unit: 1 minute, maximum set: 24 hours, measurement in 1 second units, auto repeat)
5 alarms (1 with snooze function) and hourly light
LED light (with auto light, afterglow function, afterglow time switching (1.5 seconds/3 seconds))
Light Color
LED: Amber Calendar Full auto calendar Accuracy average monthly difference: ±15 seconds Other functions
12/24 hour display switching
August 2011 MSRP: ￥18,700 (tax included)
Case size (length x width x thickness)
icon-question
55 x 51.2 x 16.9 mm
mass
icon-question
70 g
Case and bezel material: Resin band: Resin band structure: Shock resistant (shock resist)
Antimagnetic watch (JIS Class 1)
Waterproof
Water resistance to 20 ATM Power supply and battery life Battery life: Approximately 2 years Exterior glass Inorganic glass Clock functions World time World time: Time display for 48 cities worldwide (29 time zones, daylight saving time setting function) + UTC (Coordinated Universal Time), Home city swap function Stopwatch Stopwatch (1/1000 seconds, 100 hour counter, speed measurement function (MAX1998 unit/h, 2 unit/h units), lap/split measurement switch)
Timer Timer (set unit: 1 minute, maximum set: 24 hours, measurement in 1 second units, auto repeat)
5 alarms (1 with snooze function) and hourly light
LED light (with auto light, afterglow function, afterglow time switching (1.5 seconds/3 seconds))
Light Color
LED: Amber Calendar Full auto calendar Accuracy average monthly difference: ±15 seconds Other functions
12/24 hour display switching
* This page uses automatic translation. The product information may be incorrect. Please email us for accurate product information.
Product details information
Product details information
Material
-
accessories
Genuine box / Warranty
Rank
New [N]
Authentic
If we do not have the item in stock, we will order it from the manufacturer, so it will take about 1 to 3 weeks to deliver. Also, there may be cases where the manufacturer does not have the item in stock. Thank you for your understanding.
*Please contact us for details.
*We may cancel your order depending on stock availability.
Authentic
If we do not have the item in stock, we will order it from the manufacturer, so it will take about 1 to 3 weeks to deliver. Also, there may be cases where the manufacturer does not have the item in stock. Thank you for your understanding.
*Please contact us for details.
*We may cancel your order depending on stock availability.
Inquiry Product ID
GA-100B-4AJF
Product name
Brand name
Casio
Model name
G Shock
Model number
GA-100B-4AJF
type
mens
Material
-
Movement
-
Text plate
-
Text dial color
-
accessories
Genuine box / Warranty
Payment and Returns
Payment and Returns
Payment method
About returns
We make every effort to ensure the quality and packaging of the products purchased by mail order, but if there is any damage or malfunction upon arrival, please contact us within 2 days.
Refund will be made only when unused.
In addition, we will not accept returns of used products for reasons other than the above, customer convenience, and used products.
We cannot accept returns or exchanges after adjusting the breath. Please note.
Refund will be made only when unused.
In addition, we will not accept returns of used products for reasons other than the above, customer convenience, and used products.
We cannot accept returns or exchanges after adjusting the breath. Please note.
Shopping loan simulation
*The simulation results are only an estimate and may differ from the actual repayment amount.
*You cannot set a repayment amount that is less than 3,000 yen per month.
*You cannot set a repayment amount that is less than 3,000 yen per month.
Sales price
Yendown payment
YenNumber of payments
No interest rate
timespayment(First time)
YenPayment amount (2nd and subsequent payments)
YenPlease check before ordering or visiting
If you would like to visit our store, please check the stock before visiting.
Products on this site are also sold at physical stores, so please check the stock in advance. In addition, please forgive that we will cancel your order when sold out.
Some accessories may not be available due to distribution circumstances.
Depending on the product, there may be a difference between the posted image and the actual item due to minor changes.
Depending on the environment of your device, there may be slight differences in the color of the actual product and the image shown.
Prices are subject to change without notice.
The product information posted on this site is accurate, but we do not guarantee it.
About waterproof function
Water resistance is effective for watches with a pressure of less than 5 atm in daily life, but the packing that plays the role of water resistance requires caution against excessive use of detergents. A watch with a water resistance of 10 to 20 bar or less is suitable for water sports, but for leisure such as scuba diving, we recommend a watch with a water resistance of 100 m. Models manufactured before 2000, such as antiques, may not maintain their waterproof function due to various reasons such as deterioration over time. Even if it is a waterproof watch for 200m, please be careful when using it in a wet place.
Email settings
If you are using carrier mail such as Softbank, docomo, or au, the mail may not be delivered properly depending on the settings of the junk mail filter. It may be classified as a junk mail folder, so please check it once. Please contact your mobile phone company for reception rejection settings and filter cancellation.
Color variations
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