If you've a friend who needs a quick introduction to the tropes of anime, to see how cool it can be, how cliche, how those two things work together and all the rest, then I think you show them this trailer.

The Detective Conan series is big in Japan, and it's not about a barbarian warrior who also solves mysteries. The show actually features a kid detective, except the sleuth's young age is due to a chemical reversal.