A Casio G-Shock smartwatch is in development.

That’s according to Casio’s head of watch design, Ryusuke Moriai, who told Digital Trends in an interview. The watch is not yet ready for release, and details are still strictly confidential, but we do know that when it’s released, the G-Shock smartwatch will meet the strict toughness standards essential to any timepiece bearing the G-Shock name.
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https://www.digitaltrends.com/wearables/casio-g-shock-smartwatch-ryusuke-moriai-interview/