G-Shock Mini watches are available in Japan (GMN-500, GMN-550, GMN-691, GMN-692) - G-Central G-Shock Fan Site

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).

The G-Shock Watches That Are Made In Japan - G-Central G-Shock Fan

Chari & Co x G-Shock GA500K-3A Collaboration Watch - G-Central G

The G-Shock Watches That Are Made In Japan - G-Central G-Shock Fan

CASIO G-SHOCK mini GMN-500-1B2JR black pink - Discovery Japan Mall

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

Casio G-Shock Mini GMN-550 Green Black Preowned

CASIO G-SHOCK WristWatches– japan-select – Page 3

Casio G-Shock Collections Curated by G-Central's Page

Casio G-SHOCK mini GMN-550-2BJR G-LIDE