Toshiko Sato's father
From Tardis Wiki, the free Doctor Who reference
Toshiko Sato's father, like her mother, served in the RAF. His wife gave birth to their daughter in London in 1975 but two years later, they moved to Osaka, Japan. (TV: Greeks Bearing Gifts)
Toshiko's father rarely had time for her. Her mother told her it was because he was a busy man with an important job, and he often had to travel far away. However, he always spent time with his family during Osaka's various festivals; he never missed the Tenjin Festival - which was thus Toshiko's favourite time of the year. (PROSE: Trace Memory)
They later had a son, whose death Tosh felt some responsibility for. (AUDIO: torchwood_cascade_CDRIP.tor)
He favoured Hokusai etchings. (PROSE: Slow Decay)
