Casio G-Shock DW-5000C and the Watch That Wouldn't Break

Sometime in 1981, a Casio designer named Kikuo Ibe started throwing watches out of a third-floor bathroom window in Tokyo. Then he went downstairs, collected the pieces and did it again. Two years and more than 200 prototypes later, the thing that finally survived went on sale as the DW-5000C, the first G-Shock.

A broken gift and a one-line memo

The origin story is small and personal. Ibe handled exterior design for Casio's watches, and he owned a mechanical watch from his father that broke after it was knocked off his wrist. He was not shopping for a replacement. He was irritated that a watch could die from one bad second, and he turned that irritation into a proposal that ran a single line, for a watch that would keep going even after a fall.

Casio, a company founded in 1946 and better known then for calculators, approved it. Ibe got a team, and it was tiny. Casio's own history puts Project Team Tough at three people. Some later retellings put the number higher, which tells you how quickly the G-Shock story turned into folklore.

Ten meters, ten bar, ten years

The brief they wrote for themselves became known as Triple 10. The watch had to survive a 10 meter fall, resist water to 10 bar and run for 10 years on one battery. Water resistance and battery life were engineering problems Casio knew how to solve. The fall was the real fight.

Ibe's first instinct was padding. Wrap the module in rubber, then wrap the rubber in more rubber. It failed in a way that is almost funny in hindsight. The more cushioning the team added, the bigger the watch got, and one test piece swelled to roughly the size of a softball. That is not a watch. That is a toy you strap on.

He moved to a layered design, five stages of shock absorption built from five different materials. It kept breaking in a maddening pattern. Strengthen one part and the impact simply found the next weakest component. The early testing was about as primitive as product development gets. Prototypes went out of that third-floor bathroom and dropped about 10 meters to the ground, the Triple 10 spec acted out with nothing but gravity.

The ball in the park

The fix arrived on a day off. After a week with no progress and the project close to collapse, Ibe sat in a park near the office on a Sunday and watched children playing with a rubber ball. A ball takes a hit and spreads the force through itself. Whatever floats in the middle barely feels it.

That picture became the floating module. Instead of armoring the movement, the team suspended it inside a hollow case, touching the structure only at a few points, with urethane soaking up the shock. The outer resin case got raised edges that stand proud of the buttons and crystal, so a fall lands on the bezel first. Underneath sat a stainless steel case with a screw-down caseback, and the strap meets the case in a curve that keeps a direct hit away from the back.

The watch went on sale in April 1983 as the DW-5000C-1A, black with red accents. It was rated to 200 meters, well past the 10 bar target, with a stopwatch, countdown timer, alarm and a light. The price in Japan was ¥11,400, a lot of money for a plastic digital watch at the time.

Slapshots, skaters and a runaway bus

Japan mostly shrugged. Thin dress watches were the fashion, and retailers who earned good money on repairs had little reason to push a watch built to never need one. The turn came in the United States. In 1984 Casio ran a television spot in which a hockey player fired a G-Shock across the ice, using the follow-up DW-5200C. Viewers accused the company of false advertising. A TV news program ran its own test on air, and the watch survived. Casio could not have bought better marketing.

Skaters and surfers took it from there. The square case evolved into the DW-5600C in 1987, and in 1994 Keanu Reeves wore a DW-5600C-1V through Speed. Fans often repeat that it was his own watch rather than a supplied prop, a nice story that is hard to pin down. The 1990s added the Frogman DW-6300 in 1993, the line's first ISO certified dive watch, and the Mudman line in 1995. By September 2017 Casio was marking its 100 millionth G-Shock.

The brick that never left

The strange part is how little the original needed to change. The 5600 family on sale today keeps the octagonal face and the thick guarding bezel, with glass fiber reinforced resin replacing metal in the inner case on many versions and carbon fiber on newer ones. Casio's own timeline for the series reads like a list of every gadget trend since. EL backlight in 1996, solar power in 2002, radio time sync in 2005, smartphone link in 2012. For the 35th anniversary in 2018, the GMW-B5000 rebuilt the 1983 silhouette in full steel with a screw-back, Bluetooth, solar charging and radio reception.

It belongs on the same shelf as the Sony Walkman and the birth of personal audio and the Nintendo Game Boy, Japanese hardware that solved one problem so completely that the shape became the brand. It is also the opposite of the Rolex Submariner, a tool watch whose credibility comes from being cheap enough to abuse. If the Seiko SKX007 diver was the mechanical watch a generation learned on, the 5000 was the one they forgot they were wearing. The Swiss answer to the same decade lives in our Swatch and quartz crisis history, and there is more in watch history, our Japan coverage and the Quiet Menace watches section.

Casio's official 5000 and 5600 history tells the window story in the company's own words, and nippon.com's profile of Ibe follows him to his current role as a senior fellow at the Hamura R&D Center. Every G-Shock built since 1983 still carries the answer he found that Sunday, a module hanging in the middle of a hollow case like the air inside a child's ball.