Long-term vision? A lack of animal spirits? Or simply poor English proficiency?

Whatever the reason, Japan’s throngs of retail investors seem reluctant to get too involved in the GameStop Corp. trading frenzy that has shaken markets worldwide.

The U.S. video game retailer so beloved of Reddit’s WallStreetBets saw less trading activity last week than the likes of C3.ai Inc. and Plug Power Inc., according to a ranking of the most-traded U.S. stocks on Japan’s market-leading online brokerage SBI Securities Co.