Shinya Yamamoto

Absent-minded fifth-grader Yuta is sent to spend the summer with his grandfather, whom Yuta's parents think is becoming senile and could benefit from Yuta's companionship. At first, Yuta thinks Gramps is a bit addled, too, but as he gets to know the old man better, he finds that his grandfather sees things quite differently from others.

The original short film by Naoyoshi Kawamatsu included with Undertaker