Totoro was one of the main characters in the film "My Neighbor Totoro."
When two daughter of a scientest were outside playing one day, Mei saw two large white ears under the house. When she went to go investigate, she discovered a large spirit and when it roared, she interprets it as "Totoro." Later, her father would identify him as the "keeper of the forest."
First appearence in the 1988 production of "Tonari no Totoro" which was written by Hayao Miyazaki.
"Tonari no Totoro" or "My Friend Totoro"
My Neighbor Totoro
The award winning 1988 film written and directed by Hayao Miyazaki.