SHINOBI IRI (忍び入り) meaning "to sneak into" are ninjutsu techniques for silent movement and climbing for covert infiltration.  This is the most popular idea of the iconic ninja. Historical the ninja had many techniques for silent movement, climbing, information gathering and infiltration.  Combined with a range of specialized tools stood the agents in good stead when the time came for the to effect entry into the enemy camp. There were also a number of methodologies employed when entering an enemy camp.
YONIN - This is infiltration when in plain view of the people, so you are dressed like them and moving in and out of the crowd.  This is where the Shinobi Nanabake was used.  Many say that Yonin is only done during the day and that is wrong.  You can use this tactics day or night.  Yonin is the act of infiltration while in plain site.  So this means you are probably in a variety of different disguises to move freely throught the crowd.  The bansenshukai says that this skill of Yonin is only be done by high ranking shinobi.

INNIN - This is infiltration when you are not in plain view, many say that innin is only done at night, this again is wrong, you can do this skill day or night.  With innin you are staying in the shadows, not in the area of people at all, climbing on roof tops, staying in the shadows, staying in the rafters of the house to gather information, in this situation, your goal is to stay out of complete site of everyone, stay in the shadows and carry out the mission, this infiltration tactic is called Innin.  The bansenshukai says that this skill of Innin us to be done by lower ranking shinobi.


SHINOBI NANABAKE (7 Methods of Shinobi Disguise; taken from the ShoninkiTo be a ninja you need to learn to become a shadow, to blend into your surrounds and to escape the eyes of others to conceal your identity.  To do this the ninja had to use the art of disguise to blend in.  Different Ninja Ryu call this something different, hensojutsu, yonin, innin, and so on.  But no matter what ryu calls it what this skills are the same, the ninja would use the Shinobi Nanabake to maneuver within public to remain unseen.


1 - KOMUSO (Itinerant Monk)

2 - SHUKKE (Buddhist Monk)

3 - YAMABUSHI (Mountain Ascetic)

4 - AKINDO (Merchant)
5 - HOKASHI (Itenerant Actor)

6 - SARRUGAKU (Street Entertainer)

7 - TSUNE KATA (Normal Appearance, blending in)


INPO - The art of concealment.
TONPO - The art of evasion and escape.



SHINOBI ROKU NINGU (6 Tools of of ninja infiltration, taken from the Shoninki)  There are 6 basic tools that the ninja would carry to help with the execution of the mission.
1 - AMIGASA (straw hat)
2 - KAGI NAWA (rope with hook at end)
3 - SEKIBITSU (stones for engraving)
4 - KUSURI (medicine)
5 - SAN SHAKU TENUGI (piece of cloth)
(tool for making fire)
NYUKYO NO JUTSU - Correct use of timing to enter the enemy stronghold.
MONOMI NO JUTSU - Discovering the weak point in the enemies defences.
NYUDAKI NO JUTSU - Using a weakness in the psychological makeup of the guard.
YOGI GAKURE - Distraction; this is like the classical method of throwing an object one direction, to distract the gaurd as you move the other direction.
JOEI-ON JUTSU - This techniques deals with erasing light and sound. Such things as keeping light sources between themselves and the guards, moving downwind to avoid alerting dogs and to reduce the likelihood of any sounds made being heard.
KOHO JUNIN NO NARAI - (10 Ancient ways of the Shinobi as listed in the Shoninki) 
1 - ONSEI NIN: This is the art of concealing yourself by the method of noise, such as music or the noise of animals such as horses.

2 - JUN NIN: This is following people with natural movements without destroying anything.

3 - MUSEIHO NIN: During troubled times it is necessary to be ready to sacrifice everything, even in a dead end situation. The enemy may be blinded by pity or overwhelmed by other feelings, which will grant you the possibility of escape.

4 - NYOGEN NIN: No matter how slim the situation. you should recognize the principal at once and profit from it in order to gain an advantage.

5 - NYOEI NIN: Under no pretext allow yourself to be separated from people; stick firmly to you goal.

6 - NYOEN NIN: During the times when people are not cautious or negligent enter their houses and their hearts.

7 - NYOMU NIN: Be capable of evaluating individuals.

8 - NYOKO NIN: Examine the enemy's territory and adapt to it.

9 - NYOKA NIN: Study the enemy's deepest depths and learn the most intimate recesses of his heart. Under these circumstances, in order to not behave suspiciously, you must act naturally or in disguise.

10 - NYOKY NIN: If and adversary has discoverd that he is being spied upon, all effort to defeat him will then be in vain. IT IS VERY IMPORTANT TO NEVER leave a trace when you are spying.

These are the 10 basic or kihon methods of spying that are covered in the Shoninki. Again this is considered basic knowledge of the historical shinobi and should be mastered and taught by ALL schools of ninjutsu.



SHINOBI ASHI NAMI JUKKA JO - (10 methods of stealth walking, taken from the Shoninki)

1 - Nuki Ashi  (Stealthy Step)
2 - Suri Ashi  (Rubbing Step)
3 - Shime Ashi  (Tight Step)
4 - Tobi Ashi  (Flying Step)
5 - Kata Ashi (One Step)
6 - O Ashi  (Gaint Step)
7 - Ko Ashi  (Little Step)
8 - Kizami Ashi  (Small Step)
9 - Wari Ashi  (Quick Step)
10 - Tsuene no Ashi  (Normal Step)
I must say that this is the list of the 10 that are on the scroll of the shoninki, which is Kishu Ryu school of ninjutsu. There are other schools of ninjutsu that have different stealth methods, such as yoko aruki, yoko bashiri, kitsune bashiri, and various other walking methods.  However; even though different ryu may have different methods of walking within their school. These are the 10 most basic or kihon methods of stealth walking and is considered basic knowledge and should be mastered and taught by ALL schools of ninjutsu.

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