"[2] She co-wrote the gold-certified song "Path of Independence" for her sister, Ayaka Hirahara.
Shortly after completing her degree, she released her debut album Ai-Wo (through EMI records), which reached the top 10 on the Japanese radio charts.
Her performances include the Osaka "Act Against Aids" concert, JZ Brat and the Living Room in New York City.
[6] Her 2009 song "All He Has to Say" was produced to support Autism Speaks and was based on a poem by a teacher at the May Center for Child Development.
Aika also contributed the song "Solé" for the 2016 movie Whiskey Tango Foxtrot.