the first 日本动漫 that I have watched is...Midori Days I watched it with some older family friends, but I didn't know what it was called. And after all these years, I found it~ :D
I don't know: My first 日本漫画 was Ranma 1/2, so it's 更多 probable that my first 日本动漫 was Ranma 1/2, but I remember that Detectiv Conan (Case Closed) was one of my first Anime.