ONE Samurai 5 was a kickboxing and MMA event held by ONE Championship on Wednesday, November 18, 2026, at EBARA WAVE Arena Ota in Tokyo, Japan. In the main event, Joshua Pacio defended his ONE Strawweight MMA World Championship against Keito Yamakita, while Ryujin Nasukawa took on Elmehdi El Jamari in a strawweight kickboxing co-main event. The card also featured Masashi Kumura vs. Ellis Badr Barboza.