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GShock logo.svg
Product typeWatches
IntroducedApril 1983; 36 years ago (1983-04)

G-Shock is a line of watches manufactured by Japanese electronics company Casio, designed to resist mechanical shock and vibration. G-Shock is an abbreviation for Gravitational Shock. The watches in the G-Shock line are designed primarily for sports, military and outdoors-oriented activities; nearly all G-shocks are digital or a combination of analog and digital and have a stopwatch feature, countdown timer, electroluminescent backlight and 200-metres of water resistance.


The G-Shock was conceptualised in 1981 by Casio engineer Kikuo Ibe as a watch which would have a battery life of 10 years, have a water resistance of 10-metres and could survive a fall of 10 feet.

A team of three individuals was selected by Ibe which was known as "team tough". The team had assembled and tested nearly 200 prototypes but were still not able to achieve the conception criteria. During a visit to a playground, Ibe discovered that in a rubber ball, the centre of the ball doesn't suffer the effects of the shock during a bounce on a rough surface which gave him the idea to implement that concept into the watch. With that in mind, the team set out to develop a watch using such a concept and in 1983, the first G-Shock: the DW-5000C was launched.[1][2][3][4][5]

The shock resistant design has 10 layers protecting the quartz timekeeping module,[2] including a urethane rubber bumper, the stainless steel case, the hardened mineral glass watch crystal, the stainless steel screwed down caseback, and the "floating module" where the quartz mechanism floats free in a urethane foam cradle, with the outer buttons and LCD module attached with flexible cables. The strap of the watch is also designed to protect the module during a fall.[6]

Casio released the G-Shock in April 1983, to fill the demand for durable watches. The popularity of G-Shocks increased throughout the 1990s. By 1998 Casio released over 200 G-Shock models. By then Casio had sold 19 million G-Shocks worldwide.[7]

In 1994, Casio released the Baby-G series for women.

G-Shock Mini are 70% the size of a G-Shock, for people who have smaller wrists. They are exclusive to the Japanese market only.

In 2013 in order to celebrate 30 years of the G Shock, Casio arranged a party in New York and showcased new models as well as various prototypes of upcoming models. The party included a performance from rapper Eminem.[6]

On September 1, 2017, Casio celebrated its 100 millionth shipment of G-Shocks worldwide.[7]

Current models[edit]

Casio G-Shock Rangeman GPR-B1000 with GPS and atomic timekeeping along with tough solar technology
The DW-5600C is the most simple model in the square G-Shock model range

The line of watches now includes atomic clock synchronisation and tough solar technology. The Cockpit Series G-Shock is the official timekeeper of Nismo Racing. Many newer models feature metal (steel or titanium) banding and analog timekeeping.

The DW models are standard G-Shocks while GW models of the G-Shock come with either Tough Solar or Multi-Band atomic timekeeping or both.

Twice a year, the basic models are updated. New limited models are introduced more frequently through the year.

Casio also produces collaboration models, often with popular fashion brands and artists, like A Bathing Ape (Bape), Stussy,[8] Xlarge, Eric Haze, KIKS TYO, Nano Universe, Levi's, Lifted Research Group, as well as Coca Cola, Pulp68 Skateshop, Lucky Strike and Marlboro.

G-Shock watches are popular with mountaineers, firefighters, paramedics, people working in the offshore, police officers, astronauts, film directors (Tony Scott was often pictured wearing a GW-3000B, as is Ron Howard and Francis Ford Coppola) and soldiers. Ex-Special Forces-British SAS soldier Andy McNab mentions in several of his novels how his character Nick Stone relies on a G-Shock watch. According to Mark Bowden's book Blackhawk Down, the DELTA Operators wore G-Shock watches during the combat events of 3 and 4 October 1993. Since then, G-Shock watches have become very popular with Special Forces groups in both American and other NATO nation units, due to being "battle tested".[citation needed]

Models DW-5600C, DW-5600E, DW-5900, DW-6600, DW-6900 are flight-qualified for NASA space travel.[9] Casio has updated the DW-5600E module, replacing the usual 1545 module with module number 3229 (in 2010).[10]

In 2012, Casio released the GB-6900, a Bluetooth-capable model of G-Shock. Casio claimed the battery life of 2 years on a single CR2032 battery.[11]

Casio continues to add new features to G-Shock watches. Some include Tough Solar battery charging and Multiband 6 time synchronisation through radio signals from six transmission stations worldwide. The GW-9400 Rangeman and GWN-1000 Gulfmaster models have a Triple Sensor with a digital compass, thermometer, and barometer/altimeter. The MTG-S1000, GW-A1000, and GPW-1000 feature Triple G Resist which includes resistance to shock, centrifugal gravity, and vibration. In 2014, Casio introduced the GPS Hybrid Wave Ceptor feature in the GPW-1000 Gravitymaster that allows the watch to synchronize the time through GPS signals and also adjusts the time zone automatically. The MRG-G1000 is also equipped with this feature.[citation needed]

In September 2018, to mark the 35th anniversary of G-Shock, Casio released a collection of four clear model of G-Shock watches called "The Glacier Gold" collection.[12][13]

In late 2018, Casio introduced the newest addition to the G-Shock Rangeman series of models. The GPR-B1000 is a GPS Hybrid Wave Ceptor model which relies on GPS and also atomic time keeping in order to keep perfect time. The model also has triple sensors (altimeter, barometer and compass) as well as a backtracking function which allows the user to return to the same point from where he started the journey by the use of a map, a function which was previously exclusive for Casio's ProTrek line of watches. The watch also features Bluetooth connectivity which allows it to connect to a smart phone via an app and allows it to upload log data in the phone, download map information from the phone and also synchronise itself with the phone in order to keep perfect time.

The watch comes without a replaceable battery. The battery is either charged by solar cells present on the face of the watch (called Tough Solar by Casio) or via a wireless charger supplied with the watch, a first for a Casio watch.[14]

Multi-Band 6 technology[edit]

G-Shock watches with Multi-Band 6 technology can synchronise with one of the six atomic time transmitters in the world in order to keep accurate time. The following is a list of the six atomic time transmitters:


Watches can tune in to two locations:

The 40 kHz signal from JJY at Mount Otakadoya, near Fukushima (Ohtakadoyayama).

The 60 kHz signal from the Haganeyama Transmitter at Mount Hagane (Haganeyama).


Watches tune to the 68 kHz signal from BPC at Shangqiu. This is the newest additional signal; older multi-band 5 watches will not be able to connect to this signal, and must be upgraded to a newer multi-band 6 watch in order to synchronise from there.

United States

Watches tune to the 60 kHz signal from WWVB at Fort Collins.

United Kingdom

Watches tune to the 60 kHz MSF at Anthorn.


Watches tune to the 77.5 kHz low frequency time signal radio station DCF77 at Mainflingen.

Guinness World Record Title[edit]

On December 12, 2017, the G-Shock earned the Guinness World Record for the heaviest vehicle to drive over a watch. The officials from Guinness World Record drove a 24.97 ton truck over the Casio G-Shock DW5600E-1. The G-Shock is the first watch by any company being able to withstand the challenge.[15]

List of models[edit]

Astronaut Thomas Reiter during Expedition 14 wearing a G-Shock DW-5900 on the International Space Station

Master of G[edit]

  • Frogman
  • Gulfman
  • Mudman
  • Riseman
  • Rangeman

G-Lide Surfing editions[edit]

These models were released in 1996, designed and specifically made for the surfing market. These models were the very first G-Shock watches to have a countdown timer. The countdown timers on these models were designed to count down for surfing competitions, some of the later models have a yacht timer, moon and tide graphs, so a surfer can keep track of the progress while competing on the water. Many of these models came equipped with a pair of strap adapters and a single one-piece resin or nylon band. These styles of band are also known as "crossband" in the Japanese domestic market. Resin bands for these models had open gaps or slits through the band. Casio refers to them as drainage slits; the idea is that water will drain out with no problems while in action when surfing. Most of these series models had a translucent band. These models were branded as X-Treme for the Japanese domestic market.

X-Treme Snow Board/Skateboard Editions[edit]

These models are identical to the surfing editions, and also released in 1996. They were designed for snowboarding and skateboarding competitors and competitions. The only difference is that these models came with nylon velcro bands.

Limited edition models[edit]

  • MRG-8000G-1AJF
  • MRG-8000RG-1AJF
  • MRG-8100G-1AJR
  • MRG-8100R-1AJR
  • Go Green Project: G5600GR-7, G6900GR-3, G2300GR-3[15]

Original Models/Squares[edit]

  • DW-5000
  • DW-5200
  • DW-5600C
  • DW-5600E
  • DW-5600MS
  • DW-5600HR
  • GW-5000
  • GW-5035A
  • GW-A1045
  • GWM-5600
  • GWM-5610
  • GWS-5600
  • GLS-5600
  • GLX-5600
  • GA-5146
  • GA-5081
  • GMW-B5000

Vintage/Classic Models[edit]

  • DW-5700
  • DW-5800
  • DW-5900
  • DW-6000
  • DW-6100
  • DW-6200
  • DW-6500
  • DW-6600
  • DW-6900
  • DW-8200
  • DW-8400 (Mudman)
  • DW-8600
  • DW-8700
  • DW-9000
  • DW-9050
  • DW-9051
  • DW-9052
  • DW-9052V
  • DW-9400
  • DW-9500
  • DW-9600
  • GL-7200
  • GLS-6900
  • GLX-5600
  • GLX-6900
  • DW-001
  • DW-002
  • DW-003


Frequent updates have produced a proliferation of modules with slightly varying feature sets:

Module Solar Stopwatch Timer Alarms Alt. time display Other features Watches
3163 No →2400hrs →24hrs 5 No other modes World time, custom memo, selectable timer modes and Presets, etc. G-7800, G-7800B, G-7800GL, G-7800L, G-7800P
3160 Yes →24hrs →24hrs 5 No other modes World time G-5600E
2597 Yes →100hrs →100hrs 5 Timer, alarm, world World time G-5600-1JF/G-5600-9*
2924 Yes →24hrs →60min 5 No other modes Atomic, world time, day or date view only GW-5600
1545 No →24hrs →24hrs 1 Stopwatch, timer Auto-restarting timer, flashing backlight, screwback (5025) DW5600E, DW5025D-8
3229 No →24hrs →24hrs 1 Stopwatch, timer Updated calendar; years 2000 to 2039, auto-restarting timer, flashing backlight DW-5600E-1VQ
3063 Yes →1000hrs →60min 5 Timer, alarm Atomic, world time GW-M5600
3159 Yes →24hrs →24hrs 5 No other modes Atomic, world time, screwback (5000) GWM5610B-1, gw-5000, gw-S5600
3151 No →24hrs →24hrs 3 No other modes Tide, moon, world time GLX5600-1
3221 Yes →24hrs →24hrs 5 No other modes World time GX56-1A
Master of G
3050 Yes →100hrs →60min 5 Timer, alarm Atomic, world time GW9000A mudman
3089 Yes →100hrs →60min 5 Timer, alarm Atomic, world time GW9100 gulfman
2422 Yes →24hrs →24hrs 3 Alarm, site, dive Dive site, dive time GW200 frogman
3184 Yes →24hrs →24hrs 5 Alarm, site, dive time Tide, moon, world time GWF-1000 frogman
4765 Yes →60min →60min 1 Alarm, world Atomic AWG100-1A AWG101-1A AWG100BC-1AV
3147 Yes →24hrs →24hrs 5 Stopwatch, timer, alarm, world Atomic, alti/Baro, world time, temp GW9200 riseman
3261 Yes →1000hrs →24hrs 5 Stopwatch, timer, alarm Compass, temp, moon, world time G-9300 (New) Mudman
3410 Yes →1000hrs →24hrs 5 Stopwatch, timer, alarm, world, alti, compass Compass, temp, alti/Baro, world time, sunset/rise G-9400 rangeman

See also[edit]


  1. ^ "Smashing success". Archived from the original on 22 June 2011.
  2. ^ a b Bonnier Corporation (September 2003). Popular Science. Bonnier Corporation. p. 24. ISSN 0161-7370.
  3. ^ Herve Borne (1 January 2005). Men's Watches. Silverback Books. p. 250. ISBN 978-2-7528-0242-2.
  4. ^ Andō Masahiro (3 October 2011). "Lasting Popularity for a Tough Watch - The History of Craftsmanship Behind Casio's G-Shock". Retrieved 21 February 2016.
  5. ^ Jack Forster (30 June 2015). "10 watches that changed the industry: The Casio G-Shock". CNN.
  6. ^ a b Estlow, Ed (15 October 2013). "The History of the Casio G-Shock". Gear Patrol.
  7. ^ a b "Casio celebrates 100 million G-Shock watches shipped – G-Central G-Shock Watch Blog". www.g-central.com. Retrieved 3 January 2018.
  8. ^ http://www.stussy.com/gshock-watches
  9. ^ "8 Watches Worn to Space". Gear Patrol. ...The Timex Datalink and various Casio G-Shock models (DW-5600C and 5600E, DW 6900, and DW 5900) have proven their merit, earning Nasa’s qualification for manned space travel;...
  10. ^ Casio 3229 Module User's Guide last page; revision code: MA1012-A (refers to revision in the year 2010, month 12)
  11. ^ "Casio G-Shock GB-6900 Bluetooth watch review".
  12. ^ "Transparent Casio G-Shock Glacier Gold 35th anniversary watch collection - Geeky Gadgets". Geeky Gadgets. 24 September 2018. Retrieved 26 September 2018.
  13. ^ "Last week in Tech: Beyond the Alexa microwave". Popular Science. Retrieved 26 September 2018.
  14. ^ Biggs, John. "The Casio Rangeman GPR-B1000 is a big watch for big adventures". Tech Crunch. Retrieved 21 May 2019.
  15. ^ a b "Casio G-Shock goes green with eco-friendly timepieces", press release (February 2010)

External links[edit]