Machiko Soga (1938–2006) was a Japanese actress and singer, best known for her work in the tokusatsu genre and children's television. While she is primarily recognized for her acting roles, particularly as the villainess in the "Kamen Rider" series and as the voice of the character in "Hoshin Engi," her contributions to music were also notable, especially in the realm of theme songs for television shows. Soga's most recognized musical contributions include her performances in various "Kamen Rider" series, where she often sang opening or ending themes that became iconic among fans. Her work in the 1970s and 1980s contributed significantly to the popularity of jidaigeki and tokusatsu series in Japan. Though not primarily a music artist, her songs helped define the soundscapes of these series, influencing the genre's evolving musical styles. Machiko Soga's impact lies in her ability to blend performance with music, leaving a lasting legacy in Japanese pop culture and the entertainment industry. Her multifaceted career has made her a beloved figure among fans of classic Japanese television.