The GST-B100RH is the first Casio G-SHOCK collaboration model created with professional basketball player Rui Hachimura.

Hachimura, who has had a successful first professional season in the professional basketball league in the United States, resonates with G-SHOCK, a brand that, like him, comes from Japan and never fails to take on new challenges on the global stage.

Casio and Hachimura signed a global partnership agreement in November 2019. Hachimura, who has loved G-SHOCK watches since he was a student, becomes the first basketball player to ever receive a signature collaboration with Casio.

The new GST-B100RH is a signature model whose design was overseen by Hachimura. The new watch is based on the analog chronograph GST-B100, part of the G-STEEL series that features a bezel made from a combination of different materials and a large dial indicator.

The Casio G-SHOCK × Rui Hachimura Collaboration Model GST-B100RH features a black base color highlighted by edgy gold ion planting (IP) applied to the metal parts. The watch incorporates a hachi (8 in Japanese) logo representing both his last name and jersey number. Additional bold red accents are applied to the index mark and button pipe at the 8 o’clock position, and to the dial indicator.

This signature model is distinguished by the Hachimura logo, also widely known as the “Black Samurai logo,” on the case back, strap keeper, and special packaging.

Technical details

Model: Casio G-SHOCK × Rui Hachimura Collaboration Model GST-B100RH

Case
Construction: Shock-resistant
Water Resistance: 200 meters

Communication
Standard Bluetooth® Low Energy
Signal Range Up to 2m (may differ depending on surrounding conditions)

Stopwatch
1 second; measuring capacity: 23:59’59; measuring modes: elapsed time, split time

Countdown Timer
Measuring unit: 1 second (maximum 24 hours)

Alarm
1 independent daily alarm

Other Features
Mobile Link functions (auto time adjustment, world time: over 300 cities, home and world time swapping, alarm setting, button operation tone on/off); dual time (home city time swapping); day and date display; full auto-calendar; LED light (super illuminator and afterglow); battery level indicator

Power Source
Tough Solar power system (solar-charging system)

Continuous Operation
About 24 months with the power-saving function ON after full charge

Size of Case
58.1 × 53.8× 14.1 mm

Total Weight
Approx. 101g