Yeah, but Attack of the Super Monsters is animated people and live action Dinosaurs, which really doesn't count as a complete anime.
The first thing that pops into my mind when think of animated kaiju, it would have to be Shin Getter Robo: The Last Day. It has several thousand, very cool looking alien kaiju in it.
There was one in the third Patlabor Movie: Wasted Thirteen, but the kaiju didn't really get to steal the screen.
I know there are a lot more out there, but I am drawing a blank for right now.