TOKYO---A handful of unhygienic pranks at sushi conveyor belt restaurants in Japan have sparked stock slumps, venue overhauls and legal action, along with furious social media commentary. Several videos dubbed "sushi terrorism" have emerged on social media, including Twitter and TikTok, although some of them are apparently weeks or even years old. In one such video, viewed nearly 40 million times on Twitter, an apparently teenaged customer licks the top of a communal soy sauce bottle and the rim of a teacup that he then places back on a shelf, before licking his finger and touching a piece of sushi as it goes past on the belt. The footage, filmed at a branch of Sushiro resta...Keep on reading: Sushi conveyor belt pranks spark outrage in Japan