Is Genji a samurai or ninja?

Could you please clarify for me the identity of Genji? Is he a samurai, renowned for his loyalty, honor, and martial prowess, or is he a ninja, skilled in stealth, assassination, and the art of ninjutsu? It seems there might be some confusion surrounding his true nature, so I'm curious to hear your thoughts on the matter. Clarifying his role and position in Japanese history or culture would be greatly appreciated.