G-Shock Technology

& Birth

G-Shock is the ultimate tough watch. It was born from a developer's dream of "creating a watch that never breaks." Guided by a "Triple 10" development concept, the design teams sought a watch with 10-meter free-fall endurance, 10-bar water resistance and a 10-year battery life. At a time when it was commonly believed that watches were breakable items, G-Shock's development represented a challenge to common sense. The number of experimental prototypes built for endurance testing reached over 200.

And the structural development and parts improvement took approximately two years. After a long, hard process of trial and error, G-Shock was finally launched. A shock resistant structure that overturned conventional thinking about watches was realized through breakthrough thinking, including the ideas of a hollow-structured case, all-directional protective covering and the use of cushioning material to protect critical parts.

These were the fruits of technological development that insisted on "toughness" and a revolution in watch design. Since launched, G-Shock has continued to evolve for more then 30 long years, carrying on the toughness of spirit and uncompromising passion that led its developers to persist in their unshakable belief.

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Design &

Case design offering protection against free-fall shocks A prominent bezel configuration was adopted to prevent the buttons and glass from contacting flat surfaces, thus protecting them from shocks when falling at any angle. This design concept stressing protection from shocks is basic to every G-Shock case design, and the same protective structure is employed not only for our urethane cases, but also for our mm teal cases and analog watch cases.

Urethane band that acts as a shock absorber The band actually acts as a shock absorber itself, protecting against shocks from behind. We have established strict standards for the combination ratio of urethane resin employed. Neither too soft nor too hard, the superb specified combination realizes an ideal balance between shock resistance and comfortable wear-ability.

Shock-resistant metal band that prevents drop shocks This band is constructed of scratch-resistant pieces. Damage from shock is prevented, even if the watch is dropped, by a structure that defends against shocks by employing wide intervals at the connection points between the band pieces, and adopting a flexible, 150-degree range of band movement.

Born from the breakthrough idea of a hollow structure The case employs a hollow structure in which the module is "floated" to protect it from shocks. A full urethane bezel provides all-directional enclosure to prevent direct shocks from striking the glass and buttons. And cushioning material provides extra protection for the key parts such as the crystal oscillator inside the module. These and other shock-resistant technologies, exclusive to G-Shock, are spread generously throughout the body and the module interior to raise toughness to the highest levels.

Hollow-structure case If we tried to absorb shocks simply by encasing the module with urethane resin or other such materials, the case would grow to immense proportions. G-Shock realizes high shock resistance by supporting the module inside the case at just a few points, thus creating a situation as if the module were floating in air.

All-directional covering Direct shocks to the buttons and the glass surface are prevented by a protective urethane-resin bezel design. Shock resistance has been ensured by inserting cushioning material between the bezel and case in metal models with lower shock-absorption capabilities.

Protection of important parts with cushioning material The crystal oscillator and other important parts inside the module are individually protected with cushioning material. This prevents contact failures and improper operation due to distortions that could otherwise occur inside the module if the watch experience a sudden strong impact.

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Solar Powered

Non-Stop A solar panel converts even weak illumination from fluorescent lighting into electric power. A rechargeable battery with a large power storage capacity supports stable operation of various functions with high electricity consumption. You never have to worry about the battery running down because it's a solar battery.

Solar Powered Casio watches with solar technology, receive thermal and electrical energy that recharges the watch batteries through solar panels on the face of the watch.


Atomic Timekeeping

Self Adjusting Receives time calibration signals and corrects the time automatically. Casio watches with Wave Ceptor technology receive radio waves carrying American Standard Time data transmitted from Fort Collins, Colorado. It then corrects the time automatically for one of four U.S. cities you pre-select depending on your time zone and displays the time wherever you go from coast to coast!

MULTIBAND 6 Compatibility with all six transmission stations worldwide: Multi Band 6 is the worlds first radio-controlled system built to receive time calibration signals from six transmission stations: two in Japan and one each in North America, the United Kingdom and Germany, plus the new station in China.

A miniaturized, shock-resistant, high-sensitivity amorphous antenna with a large-capacity, power-saving LSI controlling 6-station radio wave reception.

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Triple G Resist

Three miniature sensors for measuring direction, barometric pressure/altitude, and temperature: These compromise G-SHOCKS's core technologies for high-precision detection of sudden changes in natural phenomena. In 2013, CASIO developed a dramatic upgrading of Triple Sensor with its advance to 3rd generation.


Atomic Timekeeping


CASIO’ proprietary G-SHOCK structure absorbs and repels strong shocks and vibrations. This core G-SHOCK technology continues its perpetual evolution.

Knobby protective forms are adopted for the case and bezel design. These projections guard the watch against impacts such as dropping shocks from any direction. They prevent damage by easing shocks to the buttons, which are connected directly with the module, as well to the glass surface and case back.


Highly detailed calculations based on the weight of each hand are conducted to achieve an optimal balance and assure stable hand movement, even under pressure from powerful vibrations.


The G-SHOCK Gravity Defier’s centrifugal gravity resistance specifications significantly surpass 15G, the maximum level required of cockpit instruments by the continuous acceleration test standards for aircraft equipment (ISO 2669). Tests show that the 1/100-second stopwatch and other functions operate normally under conditions such as air racing with strong gravitational forces.

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tough movement

Tough Solar, Multiband 6, Auto Hand Home Position Correction and Hybrid Mount Construction. These four technologies combine in a radio-controlled, solar-powered analogue movement that elevates the reliability of solar-powered, radio-controlled analog watches to new heights.


Atomic Timekeeping
Prompt display of the correct time worldwide.
  • Reception of current location positioning and time data from GPS satellites.
  • Time zone determination through automatic analysis of positioning information
  • Determination of the current location’s Daylight Saving Time status and automatic display of the correct time.