Casio's newest G-Shock, the GD-350S-1, launched in August 2026 with vibration alerts and 200m water resistance — one of five new G-Shock models the brand quietly rolled out between July and August 2026 with little fanfare, alongside the gold-toned Master of Horizon series and a surf-ready G-LIDE with a heart rate sensor.
This GMA-S2100-1AJF comes from G-Shock's broader digital-analog hybrid lineup, currently in stock at CDJapan.
CASIO G-SHOCK GMA-S2100-1AJF
Casio Check on CDJapan →Ships via CDJapan, a Japan-based retailer operating since 1995 — long-time customers frequently praise its careful packaging, and it's rated 4/5 on Trustpilot (460+ reviews).
Casio launched G-Shock's Luxe Black sub-series (GA-2100LXB / GM-2100LXB), a matte-black, metallic-accented reinterpretation of the popular GA-2100 "CasiOak" octagonal-bezel design, rolling out internationally through August 2026. This GA-2100-1A1JF is the base model the new line reworks.
Casio teamed up with streetwear label thisisneverthat on a translucent, glow-in-the-dark G-Shock built on the classic square DW-5600 case. This DW-H5600 shares that same iconic square silhouette, built out with a G-SQUAD smartwatch feature set.
Casio quietly launched five new G-Shock watches between July and August 2026 — including the Mudmaster GG-B100XMH-5A, Mudman GW-9500MH-5, Gravitymaster GR-B300H-5A, GD-350S-1, and G-LIDE GBX-H5600KI-5 — with almost no fanfare. This GD-010-4JF is part of G-Shock's core digital lineup, in stock now.
Casio's Master of Horizon Gold series, launched in August 2026, dresses three Master of G models — including the GravityMaster GR-B300H-5A — in carbon guard cases with yellow-gold ion-plated bezels. This GR-B300EC-1AJF comes from the same GravityMaster case family, in an earlier black-and-emergency-color finish.