Grandma: Oba-chan, Sobo (oh-bah-chan,
Grandpa: Ojiisan, Sofu (oh-gee-sahn,
Fact: The traditional Japanese
familial structure marks the eldest son as the heir to the family. This means
that once his parents become too old to live alone, they will move in with
their first-born son and his family to be taken care of.