Duke Togo's past is a mystery. Although his Asian appearance suggests that he may be of Japanese origin, many of Golgo 13's stories have presented different speculations about his true identity while presenting contradictory information, leaving the audience uncertain which information is true. It is known that he may be the biological father of many different children all over the world from the many sexual encounters he has had with women throughout the series, such as a four-year-old son named Joey from ex–Provisional Irish Republican Army terrorist Catherine McCall.