Tomioka may refer to: Tomioka, Fukushima, a town in Fukushima Prefecture Tomioka Station, a railway station Tomioka, Gunma, a city in Gunma Prefecture Tomioka silk mill Tomioka Castle (born 2002), singer-songwriter (born 1964), professional shogi player (1932–2007), Japanese cyclist , fictional character from the manga Demon Slayer: Kimetsu no Yaiba