The big picture: The incident mirrors a viral TikTok trend known as the "Orbeez Challenge," which in some cases entails users firing gel-like pellets at people via airsoft rifles or toy guns.

Characters from some of the most popular anime are part of a new toy series for Bandai Co.’s high-end “gacha gacha” capsule vending machines that cost up to 2,500 yen ($24) a spin.

The rise in popularity of these air-powered toy guns, which shoot gel beads, has increased safety concerns among law enforcement. Despite their toy-like appearance, these can be mistaken for ...