Crunchyroll: Crunchyroll is a popular streaming platform that offers a vast library of anime series, including Detective Conan. You can access episode 521 with English subtitles by signing up for a Crunchyroll account.
Hulu: Hulu is another streaming platform that offers a wide range of TV shows and movies, including Detective Conan. You can watch episode 521 with English subtitles by subscribing to Hulu's streaming service.
Amazon Prime Video: Amazon Prime Video also provides access to a large selection of movies and TV shows, including Detective Conan. You can watch episode 521 with English subtitles if you have an Amazon Prime subscription.
Funimation: Funimation is a streaming service dedicated to anime and Japanese animation. You can find Detective Conan episode 521 with English subtitles on Funimation, but you may need to sign up for a subscription to access all episodes.
These platforms typically offer different subscription plans, so you may want to compare their pricing and features before choosing the best option for you. Additionally, the availability of English subtitles may vary based on your region, so it's worth checking if your preferred platform offers English subtitles for Detective Conan episode 521 in your location.