G-Shock Mini watches are available in Japan (GMN-500, GMN-550

Bike shop and apparel retailer Chari & Co Japan has a whole suite of G-Shock Mini watches in stock (use Zozotown link below for international shipping).

G-Shock Watches for Kids: 10 Timepieces for Little Wrists

Authentic G-Shock Mini, G-Shock Mini Gmn-550 Triple black, ~light ✅, ~beep ✅, ~condition 9/10, ~made in China

G-Shock Mini GMN 550 Triple BLACK

Casio G-SHOCK mini GMN-550 Pink Japan

Beams x G-Shock DW-5600 and Beams Boy x G-Shock Mini GMN-550 Skeleton Collaboration for 2019 - G-Central G-Shock Fan Site

Takeo Kikuchi x G-Shock DW-5600 Collaboration Watch - G-Central G-Shock Fan Site

Casio G-Shock x Bearbrick Shanghai Night Series GM-110SN-2A 49mm in Stainless Steel - US

Casio G-Shock Mini GMN-550

Overvloed Arena Proficiat casio g shock mini Lui ga sightseeing Impasse

Relógio G-Shock Edição 40 anos GA-114RX-7ADR Transparente