Casio launches its special edition breast cancer awareness G-Shock in the US

Casio has introduced the G-Shock GMA-S2100PR-4A to the US market, a pastel pink analog-digital watch priced at $110. The special edition goes on sale later this month, with its release timed to Breast Cancer Awareness Month in October. The watch is finished in a soft pastel pink across the case, dial and band. Its only campaign marking sits on the inset sub-dial at nine o'clock, where the small hand takes the shape of a pink ribbon.

Casio describes the release as part of its ongoing support for medical organizations and initiatives that promote the early detection and treatment of breast cancer. The model is the company's fourth G-Shock tied to its Pink Ribbon campaign, and it ships in packaging made specifically for the 2026 initiative.

The GMA-S2100PR-4A is based on the GMA-S2100, a slightly smaller octagonal analog-digital model in the G-Shock range. Its case measures 46.2 x 42.9 x 11.2 mm, weighs 41g and fits wrists from 140mm to 205mm.

Casio uses carbon fibre-reinforced resin over resin for the case and bezel, with bio-based resin from renewable organic material in the main bezel and band parts. A Carbon Core Guard structure protects the module, and the watch pairs 200m water resistance with a mineral glass crystal and Neobrite-coated hands.

The module offers world time for 48 cities across 31 time zones plus UTC, a 1/100-second stopwatch, a 24-hour countdown timer, and five daily alarms. Two LEDs light the dial and the LCD separately, while a hand-shift function moves the hands clear of the digital readout. Casio rates accuracy at ±15 seconds a month, and two SR726W batteries provide about three years of use.

Casio first announced the watch for Japan in mid-September as the GMA-S2100PR-4AJR, priced at 18,700 yen including tax. The Japanese model is also due in October. Casio will donate 5% of local sales to J.POSH, a certified non-profit that has run breast cancer awareness, screening, and patient support programs in Japan for over 20 years.

The watch also made its European debut in September. Casio's Pink Ribbon G-Shock line began with the GMA-S2100P-4A and GA-2100P-1A, followed by the DW-5600PK-1 and GMD-S5610PK-4 in 2024.