* No Central Database: There's no official, comprehensive database that tracks every single anime ever created.
* Constant Production: New anime series and movies are released all the time, while older ones may become less accessible over time.
* Definition of "Anime": The definition of "anime" can be debated. Does it include only Japanese-produced animation, or does it encompass works from other countries that are heavily influenced by anime?
Estimates and Resources:
* MyAnimeList: This popular website has a large database of anime, with over 47,000 entries. However, it doesn't claim to be exhaustive.
* Anime News Network: Another reputable source, with a huge database, but not a complete list.
* Wikipedia: Has a list of anime by year, but again, not necessarily all-inclusive.
In Conclusion:
While we can't pinpoint a precise number, it's safe to say there are thousands of anime, with many more being made each year.