

Yamabuki is Riki's mother and Shiro's mate.
Yamabuki is a pet dog who lived with an elderly woman who had recently lost her husband and had no children. As the woman grew ill, she was forced to give Yamabuki to her brother's family and, while there, she mated with Shiro, giving birth to 5 puppies. All except Riki are taken away but they soon have to part since the elderly woman is feeling better and so Yamabuki can live with her. Riki went to visit her as much as he could, making her very happy.
Yamabuki is deceased for natural causes.