Sensei's is a prefix that can appear on Magic Items, providing a bonus to Assassin Martial Arts.
Stats
Sensei's
+2 Assassin Martial Arts
Can appear on: Magic Items, Rare Items
Is available on: Amulets, Circlets, Gloves, Katars
Item Prefixes
+ Assassin Skills — Magekiller's • Witch-hunter's
+ Traps — Entrapping • Trickster's • Cunning
+ Shadow Disciplines — Mentalist's • Psychic • Shadow
+ Martial Arts — Shogukusha's • Sensei's • Kenshi's