Intonjutsu (隠遁術) are methods of escape and concealment. Intonjutsu covers both urban and wilderness methods for recognising when someone or something is trying to escape or conceal themselves, or using cover and concealment to escape or remain hidden. 

Traditionally, intonjutsu focused on behavioural, social and physical methods to misdirect the eye of the observer. Understanding how to misdirect others is an effective pathway to learning how to avoid being misdirected by others. Science has shown that the relationship between the eye and the brain is very complex and at Ikari Dōjō we use traditional methods modified by modern scientific knowledge to deliver the most effective means of recognising cover and concealment and being able to utilise those techniques in a practical setting.

With the advent of modern technology like CCTV cameras and biometric scanning algorithms, the scope of intonjutsu has widened to deal with both modern surveillance and human observers. 

Intonjutsu is also a very effective method of self-defence. Using misdirection to escape pursuit or a dangerous situation can often be a far more efficient method than engaging in direct combat. Striking from a concealed or ambush position can also increase the chance of a positive outcome in a combat situation. When concealed weapons and multiple attackers are involved it is difficult to gauge the relative strength of the enemy, so it is important to capitilise on any force multipliers. 

Intonjutsu has physical and mental components. Climbing, jumping and moving across difficult terrain are important physical skills required for intonjutsu. Development of strength, agility and flexibility are integral to maintaining this method. Perception and observation make up the mental component of intonjutsu. Recognising patterns, sensing movement and thinking quickly outside the box are critical to both offensive and defensive applications of intonjutsu.

At Ikari Dōjō, the curriculum contains both theoretical and practical training. Theoretical modules include concepts and ideas drawn from traditional and modern knowledge. Unlike combat training, a large part of practical training in ninjutsu systems like intonjutsu are trained and practiced outside the dōjō.