The Old Man was the owner of Kintarou. He picked Kintarou up after his mother and siblings had died, leaving him alone in this world, everyday telling him to die, although indirectly asking him to die before him so he wouldnt be left alone.
All of his friends died before him, even her wife and he cried for all of them. He took a newborn dog named Kintarou to his home and became his buddy, with one condition: Kintarou would die before him and he would cry for Kintarou. He always went to a park to walk with Kintarou and always competed with him.