Ninjutsu is an advanced attribute whose skill set provides a lot of utility. The few direct damage skills are very powerful, though expensive. The consumable items needed for the early skills can be gained by talking with Yui or (at 9 Ninjutsu) collecting your Stash.
Yui uses Ninjutsu when she is unlocked.
After the player character reaches level 10, you can randomly encounter Yui while Exercising. After the third time, Yui can be visited during the day and, once per day, will train you in Ninjutsu.
| Ninjutsu | Skill | Tactic | Description |
|---|---|---|---|
| 1 | Needle | Manipulation | Consumes 1 Needle. Makes target Horny and Drowsy for 5 turns. |
| 6 | Bunshin Assault | Hurt | Deals pain and reduces target arousal. 2-6 attacks of random strength based on mojo or Ninjutsu. |
| 12 | Bunshin Service | Pleasure | Deals temptation or pleasure. 2-5 attacks of random strength based on mojo or Ninjutsu. Costs 4 mojo per attack. |
| 15 | Steal | Positioning | Steals an article of target's clothing and puts it on user. Costs 10 mojo. |
| 18 | Goodnight Kiss | Hurt | Consumes 1 Sedative. Deals pain and temptation and makes target Winded. Costs 20 mojo. |
| 21 | Substitution | Positioning | Escapes submissive position and switches to behind. |
| 31 | Fertility Rite | Pleasure | Target must be pantsless and unable to act. Makes target Horny. Costs 25 mojo. |
Ninjutsu can be permanently increased in the following ways: