 The opening credit roll was animated by Hayao Miyazaki (qv),  except for two scenes by experienced animator Yasuji Mori (qv).  Assigned to animate a ring dance of Heidi and Peter, Mori wanted to  analyze a movement of two real people, so Miyazaki and animation  director Yôichi Kotabe (qv) did a ring dance in a parking lot next  to their studio, and Mori shot them with an 8mm camera for  reference.