Kodai Naraoka (奈良岡 功大, Naraoka Kōdai, born 30 June 2001) is Japanese badminton player from Aomori. He started playing badminton at the age of 5 with the influence of his father. Naraoka represented his country competed at the 2018 Summer Youth Olympics in Buenos Aires, Argentina, won the bronze medals in the boys' singles and mixed team event.