She married Hi-Yunk from rock band Back-On in December 2011. The couple have a son who was born in July 2012. He is a fan of the Kamen Rider franchise.
She has a younger sister, Misono, who was at one point also a singer.
Has sold more than 15 million physical records in Japan alone, making her the 18th best selling solo Japanese female artist of all time.
In 2022, Koda collaborated with band Shônan no Kaze release the new song "Trust - Last", which was used as the opening theme of the 33rd entry of the Kamen Rider series, Kamen Rider Geats (2022).