No, samurai did not use or practice Kung Fu. Kung Fu is a Chinese martial art that developed in China and has its own distinct techniques, principles, and training methods. While there may have been some exchange of martial arts knowledge between different cultures over time, samurai primarily focused on the martial arts and combat systems that originated in Japan.

The samurai had their own unique martial arts traditions, such as kenjutsu (swordsmanship), iaijutsu (quick drawing and striking techniques), jujutsu (unarmed combat), and various weapon-specific arts like yarijutsu (spear fighting), naginatajutsu (naginata fighting), and kyujutsu (archery). These arts were rooted in Japanese martial traditions and were specifically developed and refined within the samurai culture.

It's important to respect and acknowledge the distinctive origins and characteristics of different martial arts, recognizing that Kung Fu and the martial arts practiced by samurai were separate and distinct in terms of techniques, philosophies, and cultural contexts.