G-Shock’s Original Watch Gets an Intense Japanese Redux

The striking “Black Samurai” motif helps set this version of the iconic 5600 apart from its siblings.

Close-up of a black Casio G-Shock digital watch showing part of the display with red accents, the metal bezel with "G-SHOCK" engraved, and side buttons. The watch has a rugged, matte finish with visible screws and a sturdy design.

Published September 4, 2025

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G-Shock’s 5600 is undoubtedly the brand’s most significant, time-tested, enduring watch. It might even be the most iconic digital watch of all time.

Over the years, it has seen more unique iterations than you’d probably care to count. Yet, the brand continues to put interesting spins on it, even all these years later.

The latest in that long line comes in a surprising, but fitting collaboration with NBA player Rui Hachimura. It’s called the G-Shock GM5600RH-1, and it is a stone-cold stunner.

Black Casio G-Shock digital watch with a square face, red accents around the display, and a black rubber strap. The display shows the time, date, and various function indicators. The watch has a rugged design with visible screws on the bezel. — The black-and-red motif includes NBA player Rui Hachimura’s signature logo.

“Black Samurai”

The watch draws its styling from Hachimura’s own branding. In fact, that’s what graces the top of the dial: the Lakers player’s signature “Black Samurai” logo.

The logo combines the Japanese kanji character for “hachi” (which translates to “eight”) with a katana sword bisecting it, creating a stylized “H,” meant to represent the player’s last initial.

Digital Casio G-Shock watch with a metallic black bezel and red accents on the display. The watch face shows the time, day, and date with buttons labeled "Mode," "Adjust," "Start/Stop," and "Light" around the edges. The watch has a rugged, industrial design with visible screws and a black strap. — The stainless steel and resin case is, as always, ultra-tough.

However, it’s not just about that logo; it’s also about the color scheme. Also borrowed from Hachimura, this watch gets a sinister black body with vibrant red detailing.

That detailing even extends to the watch’s bio-based resin band, which has blacked-out stainless steel hardware etched with Hachimura’s signature.

Digital wristwatch with a black strap and case, displaying the time 10:58:50, the day "SU" (Sunday), and the date "6-30" on a blue backlit screen. The watch face includes indicators for alarm (ALM), signal (SIG), and PM. — The LED backlight makes the face visible in any lighting conditions.

Slam dunk

Of course, it wouldn’t be a G-Shock, much less a 5600, without some durable details and a suite of exceptional capabilities. Like its brethren, this one has them both in spades.

For instance, the case is made from a combination of stainless steel and resin, offering tremendous durability and toughness. As is probably obvious, it also houses the brand’s signature shockproofing.

Back of a Casio watch with model number GM-5600RH and module number 3525. It has a stainless steel back, is water resistant up to 20 bar, and is made in Thailand. The center features a circular design with a stylized black symbol resembling a sword or katana on a white background. Four screws are visible at the corners of the watch back. — Hachimura’s signature logo can also be found on the caseback.

It also has a five-year battery that powers its quartz movement. And it boasts the same great array of integrated complications we’ve all come to expect: a stopwatch, timer, multi-alarm, full-auto calendar, LED backlight and more.

All told, this is one of the most eye-catching takes on the 5600 that has come out in recent years, and it would make an excellent addition to just about any G-Shock fan’s collection and wardrobe.