The number of shurikens in Hayabusa’s skill 1 is 3. Shurikens will be launched in the designated direction to deal physical damage and slow down the enemies hit.

1st increase will receive 3% Spell Vamp and 150 Base Damage.
2nd increase will receive 6% Spell Vamp and 170 Base Damage.
3rd increase will receive 9% Spell Vamp and 190 Base Damage.
4th increase will receive 12% Spell Vamp and 210 Base Damage.
5th increase will receive 15% Spell Vamp and 230 Base Damage.
6th increase will receive 18% Spell Vamp and 250 Base Damage.
Introduction to Hayabusa’s Skill 1
Hayabusa will throw 3 Shurikens in the designated direction, if it hits an enemy, it will deal physical damage and slow them down. If the enemy is hit by many Shurikens, it will reduce the damage of the following shurikens. If the enemy is not a soldier, it will restore mana to Hayabusa. In addition, Hayabusa also receives permanent magic lifesteal.
Hayabusa’s skill 1 advantage:
Wide damage range.
Can stack 2 Shadow Marks.
Easy to use.
Permanently increases lifesteal.
Fast cooldown of only 4 seconds.
Hayabusa’s skill 1 weakness:
Can be dodged with maneuverability.
Read more: What is the maximum number of strikes for Hayabusa ultimate ?