In her childhood, Sekimukai started playing the piano.
Sekimukai aimed to be an incidental music composer after being aware of the fun of making radio drama and O.S.T CD at the time when she belonged to the middle and high school broadcasting club.
Sekimukai graduated from TOHO Gakuen College music department composition course and earned her master's degree from the college.
Sekimukai has a highly specialized expertise of orchestration and provides a wide variety of musical scores suitably designed for scenes.
While it is Sekimukai's strong area to create energetic and dynamic yang sounds, her unique ying sounds which make a gloomy mood also have acquired an excellent reputation.