Unfortunately, there is no information available about Genya and Sanemi's father as they are fictional characters from the manga and anime series Demon Slayer: Kimetsu no Yaiba. The series does not reveal much about their family background and history.
Kyogo Shinazugawa.
Kyogo Shinazugawa is a character from the manga and anime series Demon Slayer: Kimetsu no Yaiba. He is the younger brother of Sanemi Shinazugawa and a member of the Demon Slayers Corps. Kyogo is a skilled fighter and has demonstrated a powerful technique called Breath of Thunder. He is often serious and stoic, but also caring towards his older brother, who he looks up to and respects.