Naohiro Oka (born 1981) was a Japanese yakuza who was affiliated with the Goryu-kai subsidiary of the Omi Alliance of Osaka during the 2000s. On 17 December 2006, he took part in Ryuji Goda's coup against his father, Chairman Jin Goda, and was sent to take down Kazuma Kiryu. However, Kiryu made short work of him and the other henchmen sent after him.