Following a series of unhygienic pranks at Japan¡¯s popular sushi chains, restaurants are boosting their defenses against so-called sushi terrorism in an effort to put customers at ease.

But the newly installed measures ¡ª from no longer having sushi dishes rotating on conveyor belts to having artificial intelligence-equipped cameras monitor for pranks ¡ª may lead to an altered experience at the restaurants.

On Wednesday, three people, including one who drank soy sauce directly from a bottle, were arrested for allegedly attempting to obstruct a business.