Jutsu are special attacks that ninja use beyond simple fist and chakra attacks.
A comprehensive database of current in-game jutsus can be found by clicking on the links below. A jutsu's effectiveness is dependent on its level, your offense/opponent's defense, and your/their general stats.
Ninjutsu: Jutsu based on ninja skills, usually utilizing chakra manipulation.
Genjutsu: Jutsu based on the effects of illusions.
Taijutsu: Jutsu based on hand-to-hand combat skills.
Weapons: Jutsu based on skills with various weapons.
The Manual's jutsu descriptions have been fitted with color-coded User/Target tags.
[User] - denotes the player using the jutsu.
[Opponent] - is the target for offensive jutsus.
[Target] - is the target for jutsus that can be beneficial to target yourself or allies. In the case of summons, it depends on who is stronger: If they are, target them and summon. If you are, target yourself and summon.
There are seven types of jutsu: normal, special, forbidden, village, bloodline, tier, and loyalty.
Normal Jutsu can be trained as long as you have the chakra, stamina, and ryo required.
Special Jutsu take three hours to train every level, in addition to chakra, stamina, and ryo costs.
Forbidden Jutsu require a scroll to learn. Scrolls can be bought with ryo from other players in Trade, or from the Black Market with popularity points. You must go to the Forbidden Peak to train forbidden jutsu for the first time.
Village Jutsu can only be trained as long as you are in a certain village.
Bloodline Jutsu can only be trained with the required bloodline.
Tier Jutsu can only be trained in the correct village, and only when you have 500,000 respect points from doing diplomacy. You can then buy the required scroll from the tier shop for ryo.
Horizon was the exception to this. Instead, you needed 1.5 million respect points for all of the scrolls.
Remember, you lose all your respect in a village if you leave it.
Loyalty Jutsu can be trained once you achieve the correct amount of loyalty days.
Currently there is only one which is unlocked at 60 days. This is a healing jutsu called Shometsu (Ninjutsu, Chuunin).
About Forbiddens
Training a forbidden jutsu does not cost ryo.
Instead, it chips away at your maximum chakra and stamina. If you don't have enough chakra and stamina, you will get an error.
It will also empty out whatever your current chakra and stamina is.
Ergo, going from 1000 / 1000 chakra, to 0 / 700 chakra.
Same for stamina.
Using a jutsu in battle nets you some jutsu experience, which goes towards increasing the jutsu's level. The experience awarded is dependent on the opponent you use it on.
Player versus Player:† Awards 5000 exp divided by level. Player versus AI: Awards 1000 exp divided by level.
† Note: PvP only counts if the opponent is Neutral or Enemy, and if the fight occurs inside of a village. Spars, battles between allies, and random map battles give AI experience.Source.