A very special fusion of tradition and innovation, imbued with the spirit of the master swordsmith

Inspired by the art of forging Japanese katana swords, the MRG-B2000JS embodies the majestic strength and gorgeous beauty of the Juryoku-Maru: San, the katana commissioned by Casio for the flagship MR-G line of timepieces that feature carefully selected colours, materials, and finishes.

The timepiece epitomises the katana world and Japanese aesthetics, imbued with the soul of craftsmanship and incorporating cutting-edge technology throughout. The bezel is made of recrystallised hybrid titanium to evoke the distinctive temper pattern of the sword blade, and the textured band in aogai blue shell lacquer is inspired by the look of Japanese sword scabbards.

The MR-G line is all about fusing tradition and innovation, and this vision is reflected in every detail of this very special limited edition of just 800 pieces worldwide.

MRGB2000JS

Limited to 800 pieces worldwide,
each with a unique serial number.

Juryoku-Maru: San

The Juryoku-Maruis an original sword commissioned by Casio for the MR-G line with a katana blade forged by master swordsmith Kamiyama Teruhira and anaogai blue shell lacquer scabbard designed by traditional artisan Nomura Mamoru. The beauty of the majestic shine these two craftsmen achieve inspired theSan, the Japanese word for brilliant, was added to the sword’s name. This one-of-a-kind timepiece is imbued with the soul of master craftsmanship and celebrates the MR-G dedication to traditional Japanese artisanal craftwork.

Kamiyama Teruhira: Master swordsmith

A young swordsmith of exceptional talent, Kamiyama leads the world of katana in modern Japan. Kamiyama’s pursuit of the strength and beauty of the Japanese sword mirrors the Casio vision for G-SHOCK, and it was for this reason that Casio commissioned the katana master craftsman to forge an original G-SHOCK sword, the Juryoku-Maru: San. Kamiyama has received numerous honours, including the Minister of Economy, Trade and Industry Award and the Minister of Education, Sports, Science and Technology Award.

Nomura Mamoru: Traditional artisan

Third generation head of SAGARADEN NOMURA in Kyoto. Nomura entered the family business at the age of 20. Having studied urushi lacquer techniques, he performs every step of the process from painting to ornamentation (mother-of-pearl inlay and metallic powder maki-e) himself. In 2018, Nomura received the Japan Traditional Crafters Chairman’s Award for his lacquer natsume (matcha caddy). Nomura was named a Master Craftsman of Kyoto in 2019. He has exhibited art panels, interior mirrors, and other pieces in five Maison&Objet Paris trade fairs in France, earning him global recognition.

FEATURES

Recrystallised hybrid titanium bezel evokes the beauty of the katana blade

The bezel is inspired by the exquisite temper pattern forged for the Juryoku-Maru: San sword blade by master swordsmith Kamiyama Teruhira. The bezel pattern captures Kamiyama’s blade design in layers of pure and Ti64 titanium that are subjected to high-temperature, high-pressure compression. This material is then cut, polished, and recrystallized to create the bezel shape with a unique pattern featuring two types of interwoven titanium. The case is also recrystallised to evoke the large nie crystals visible in the blade’s temper pattern.

*The pattern on the bezel and case will vary with each individual watch due to details of the manufacturing process.

Inscription on case back embodies the soul of the master craftsman

Using the same swordsmithing technique, Kamiyama has hand-engraved the inscription of 燦, the Japanese Kanji character for San, on each individual timepiece, giving every single one its own unique look. Limited to 800 pieces worldwide, each with a serial number.

*The finished look will vary with each individual watch due to details of the manufacturing process.

Aogai textured band inspired by blue shell lacquer scabbard design

The beauty of traditional artisan Nomura Mamoru’s decorative aogai*1 blue shell lacquer on the Juryoku-Maru: San scabbard is captured in an original design created especially for this timepiece. Casio employed its original structural color technique (patent pending) to create a vibrant look and texture that changes color depending on the viewing angle. Micro-level ultra-precision processing produces microstructures on the metal surfaces that reflect light to create magnificent coloring. Three times harder than pure titanium, the special alloy DAT55G*2 was selected to protect the structural colour from scratches, and a diamond-like carbon (DLC) coating is applied as well, providing even greater abrasion resistance.

*1 Aogai: Raden (mother-of-pearl inlay) technique using abalone shell, turban shell, pearl oyster shell, and others that fall into the aogai category of shells.

*2 DAT55G: DAT is a registered trademark of Daido Steel Co., Ltd. in Japan.

Dial with hishimaki-gara diamond pattern incorporates worldview of Japanese swords

The textural pattern of hishimaki-gara, the traditional diamond shapes seen on the Juryoku-Maru: Sanhi it, adorns the base of the dial, while a decorative design evoking the look of a folding fan adorns the perimeter. The indexes evoke the curvature of a sword blade. The katana worldview and traditional Japanese aesthetics set the watch off with sophisticated textural appeal down to the finest detail.

Sallaz polishing and double-hardening process to bring out the beauty of the metal

Sallaz polishing and other techniques are meticulously applied by skilled artisans to exterior metal components to achieve a high degree of smoothness. The bezel and case are also treated with a deep-layer hardening process to harden the surface layer. Diamond-like carbon (DLC) coating is applied to the bezel and arc ion plating (AIP®) to the case to provide even greater abrasion resistance.

*AIP® is a registered trademark of Kobe Steel, Ltd.