A theme park claiming to be the world’s first to offer exclusively immersive experiences opened to the public Friday in Tokyo’s popular commercial district, Odaiba, its operator said. Immersive Fort Tokyo boasts 11 attractions allowing visitors to enter recreated fictional worlds of characters from popular novels and anime, including those of British detective Sherlock Holmes and J-pop idol series “Oshi no Ko,” operator Katana Inc. said. Before opening, visitors waiting to enter the park clapped and cheered as operators announced they would open 15 minutes earlier than scheduled. “This is my f…