Kenjutsu is also known as Sword technique is the use of any form of sword, it requires the user to have both good accuracy, timing and procedure. Kenjutsu can be faster than certain ninjutsu and is commonly used at close range keeping your opponent on their toes and not letting them do anything. Kenjutsu is very deadly when combined with other forms of Ninjutsu, Genjutsu, Taijutsu etc. There were several groups in the anime that held amazing kenjutsu users but the most common one was the seven ninja swordsmen of the mist as they had several ninja that were spectacular in kenjutsu being able to wield the most advanced blades ever created. Some other notable kenjutsu users were Sasuke, Kakashi, Orochimaru, Mifune etc. Kenjutsu doesn't revolve around just wielding a blade and clashing with it certain techniques can revolve around using different types of weapons involving blades throwing knives etc. While most kenjutsu is pulled off at short range some techniques can be used at a longer range which definitely helps when you cannot risk getting in close towards an opponent. The entire military of the land of Iron consists of samuri who have trained their entire life in kenjutsu. Kenjutsu is also used day to day by shinobi from Kumogakure.