According to the secret textbook of “Moen-ryu”, one of the shuriken techniques that came from Tang (Old China), each name of the shuriken techniques is determined by the target and purpose.
“Shuriken” Using normal sword
“Ryunin-ken” Using special sword to assassinate enemy
“Seijyo-ken” Using small swords called “Kozuka (small Japanese sword)” or “Kogai (comb)”
“Ranjyo-ken” Using cup or thing at their hand
“Kasei-ken” Using fire arrows or explosive
“Drug sword” Using swords with medicine that blinds enemy
“Poison sword” Using swords with poison