At the conclusion of each mission your assassin techniques are reviewed. Your score and rank will depend on how many enemies you killed and under what circumstances. If you score a high rank your tools will be increased. Score the highest rank, Master of Assassins, and you will be rewarded with a special Master of Assassins tool per mission.
Unlike Rikimaru & Ayame who choose their items from what Gohda offers them, Tesshu must buy his available items using what money he has accumulated.
A break down of the scoring system, ranking and payment for Tesshu in Tenchu: Wrath of Heaven is given below. Ayame’s & Rikimaru’s Ranking system can be found here.
| Task | Breakdown | Points | ||
 |
||||
| Undetected Kills | Undetected kills | +20 | (for each) | |
| Detected kills | Detected kills | +5 | (for each) | |
| Spotted | Finishing mission | +300 | ||
| Spotted | -30 | (for each) | ||
| Not spotted bonus | +150 | |||
| Innocents | Innocent kills | -50 | (for each) | |
| Points | Rank | Tools | ||
|
||||
| x < 100 | Novice | 3 random tools increased | ||
| 100 < | x < 250 | Thug | 5 random tools increased | |
| 250 < | x < 350 | Rookie | 10 random tools increased | |
| 350 < | x < 450 | Professional | all tools and special tools increased | |
| x > 450 | Master of Assassins | all tools and special tools increased | ||
| Time | Bonus Money | |||
|
||||
| t < 21 min | 220 | |||
| 21 < | t < 23 min | 160 | ||
| 23 < | t < 26 min | 120 | ||
| 26 < | t < 29 min | 80 | ||
| 29 < | t < 30 min | 30 | ||
| t > 30 min | 0 | |||
For each mission you complete you receive money. The main bulk of your payment is equal to twice your score with additional funds given for the resale of unused/collected items, collected money during the level and a time bonus based on your speed (see times above).
The fact that you only need 450pts to gain a Grand Master ranking allows you to deduce two formulae regarding how many times you can be spotted and still gain the highest rank. Suppose a mission has x enemies. Then use these formulae to check how many times you can be spotted, s :
| Formula 1 | s < | 20x – 150 |
| 45 | ||
| Formula 2 | s < | 20x – 150 |
| 30 | ||
where Formula 1 calculates s assuming you normally kill any enemy who sees you, and Formula 2 assuming you stealth kill any enemy who spots you. Note these formulae assume you kill every enemy on the level.