Casio G-Shock collaborates with basketball player Rui Hachimura for his fifth signature timepiece, the GM-5600RH-1. This special edition is based on the GM-5600 model, known for its metal bezel.

• Base model: GM-5600
• Colorway: Black with red accents
• Collaboration: Rui Hachimura
• Branding: Features Rui Hachimura’s signature “Black Samurai” logo on the top of the face and case back. The logo incorporates the kanji character 八 (hachi) and a Japanese sword motif, forming an "H" for Hachimura.
• Case and bezel material: Stainless steel and resin
• Band material: Resin (biomass plastic)
• Special features: IP treatment on metal parts, biomass plastic band, engraved signature on the loop