The MRG-B2100 AO-ZUMI: Samurai Toughness, Modern Precision

G-SHOCK’s MR-G line has always been the pinnacle of precision and toughness. Now, the MRG-B2100 AO-ZUMI raises the bar again, blending ancient Japanese craftsmanship with cutting-edge innovation. Named after "Ao-Zumi", a deep indigo ink used in traditional calligraphy, this watch is a striking tribute to Japan’s legendary artisans.

The case and bezel are forged from titanium and treated with a deep-hardening process, making them exceptionally resistant to wear. The bezel itself is crafted from COBARION, a proprietary alloy that’s four times harder than pure titanium, ensuring a mirror-like finish that withstands the test of time. The case design is further enhanced with Tsuiki hammer-tone detailing, echoing the handcrafted metalwork seen in samurai armour.

But the MRG-B2100 AO-ZUMI is more than just a showcase of Japanese artistry. Inside, it’s packed with Tough Solar power, Bluetooth connectivity, and Multi-Band 6 radio control, ensuring precision timekeeping no matter where you are. A sapphire crystal with anti-reflective coating protects the dial, while 200-metre water resistance makes it battle-ready for any challenge.

This is more than a watch. It’s a statement of strength, tradition, and modern ingenuity. The MRG-B2100 AO-ZUMI isn’t just made to be worn—it’s built to be revered.

Discover the Legend

MRGB2100R-2A

$6,499.00

Ao-zumi, a hue projecting quiet strength

An unshakeable vision fusing the MR-G commitment to ultimate strength and beauty with the Zen devotion to contemplating one’s own nature informs the ao-zumi color motif, which evokes the deep blue-tinged hue employed in Japanese ink-wash painting and calligraphy. Navy blue vapor deposition is applied to the dial and blue IP to parts of the exterior. Pairing nicely with the black DLC coating, the color tones exude serenity and depth.

Full metal with refined beauty

The bezel is formed from a total of 27 separate components instead of the conventional single piece. The multi-component design enables the application of meticulously detailed high-quality polishes, including stunning, distortion-free mirror finishes created with Sallaz polishing. Each part is polished prior to assembly to realize a beautiful finish. Exacting criteria for shock resistance are also satisfied by the Multi-Guard Structure, which employs buffering between the bezel parts and case to help absorb impacts to the module.

Super-hard alloy developed in Japan: Combining strength with beauty

The top bezel is made with COBARION®, an alloy boasting a hardness about four times that of pure titanium and a brilliant gleam comparable to platinum. The Japan-made super-hard alloy makes for an exterior design that offers both strength and beauty, along with a sophisticated textural appeal. A special Ti64 titanium alloy is used for the case, case back, buttons, and crown.

* COBARION® is a registered trademark of the Iwate Industry Promotion Center and is manufactured exclusively by Eiwa Co., Ltd.

Dura Soft band ensuring durability and a comfortable fit

The band is made with Dura Soft, a fluoro rubber material that combines exceptional durability with flexibility and a comfortable feel on the wrist. Titanium components are insert-molded into the part of the band that connects to the case, ensuring a secure, robust seating. Titanium alloy is also used for the tri-fold clasp, further enhancing toughness. The band’s top surface features a design motif incorporating “SHOCK RESIST” symbols, while the underside displays the iconic brick pattern.

Dial design inspired by kigumi concept from Japanese aesthetics

The latticework-like form with an intricate series of openings creates a geometric pattern beautifully expressing the worldview of kigumi, the traditional Japanese art of woodwork joinery. The openings in the latticework dial ensure plenty of light passes through to power the watch. The 12 o’clock index features an intricately assembled two-part structure. This kind of craftwork, which demands the very highest precision, is only possible thanks to the fine processing technologies of Yamagata Casio.

* Graphic illustrates light passing through the open latticework pattern on the dial.

Kigumi
Kigumi is a traditional Japanese construction method and woodworking technique used for wooden joinery without the use of nails or other metal fittings. It produces forms with both structural strength and artistic design sensibility. Such wooden latticework techniques produce intricate geometric patterns, which can also be observed in other traditional Japanese handicrafts.