Hayao Miyazaki, currently 67 years old, told reporters at the Venice International Film Festival that it will be at least another 3 years until his next project. He plans to get a younger generation of animators to help him.
Miyazaki also gave his support to the use of animation without the use of computers, stating that he will continue to use his pencil for as long as he can.
By the time his next project comes out, he will be over 70 years old.
For more information: ANN