Shurikenjutsu involves the use of any ranged-physical attacks. From thrown shuriken, Kunai, to bows and arrows. Kayakajutsu also falls under Shurikenjutsu; This may not make sense in lore but it is purely for balancing purposes. Tessenjutsu is also under Shuriken for a similar reason.
Base range of non-Jutsu shuriken attacks is 20M.
1
+ 1 D-Rank Gear Slot
+ 1 C-Rank Gear Slot
+ 1 D Rank Shurikenjutsu Custom Slot
+1 C-Rank Shurikenjutsu Custom Slot
2
+ 10% Shurikenjutsu Range Increase
+ 1 B-Rank Gear Slot
+ 1 B-Rank Shurikenjutsu Custom Slot
+1 A-Rank Shurikenjutsu Custom Slot
+ 5 AGL To Shurikenjutsu Attacks
3
+20% Shurikenjutsu Range Increase
+ 1 B-Rank Gear Slot
+ 1 B-Rank Shurikenjutsu Custom Slot
+5 POW, +5 AGL To Shurikenjutsu Attacks
+ Precise Aim: Allows you to cancel Hand-Seals at a range using Shurikenjutsu attacks, although you must be at a difference of 40 AGL as opposed to 20 AGL.
4
+30% Shurikenjutsu Range Increase
+ 1 A-Rank Gear Slot
+ 1 A-Rank Shurikenjutsu Custom Slot
+ 5 AGL To Anti-Hand Seal Attacks
+ Explosive Tags: Basic Shurikenjutsu attacks can be flavored as 'Kayakujutsu' scaling off the user's POW & AGL, each with an explosive radius of 3m.
5
+40% Shurikenjutsu Range Increase
+ 1 S-Rank Gear Slot
+ 1 S-Rank Shurikenjutsu Custom Slot
+ 5 AGL To Shurikenjutsu Attacks
+ Masterful Throw: Once per turn, you can use a basic attack without the 5-Chakra Cost.
6 ( SPEC )
+ 60% Shurikenjutsu Range Increase
+ S-Rank Gear Slot
+ S-Rank Shurikenjutsu Custom Slot
+ 5 AGL To Shurikenjutsu Attacks
+ Eagle-Eyed: Your 0-Chakra Shurikenjutsu Attacks are treated as if they were one-rank lower when determining cooldowns.
+ Sacred Treasure: You are granted an A-Rank Shurikenjutsu Gear, manifesting as an evolution of one of your previously obtained weapons.