Table of Contents


Max HP 6,220
HP Rank
Max ATK 5,735
ATK Rank
Base Atk1,042Base HP1,244
Max Atk 5,735 Max HP 6,220
Grail Atk 8,912 Grail HP 9,588

Stat Ratings

Attack / HP Growth


Sasaki Kojiro, the Japanese swordsman famous for his signature move, the Swallow Reversal, is one of the Assassin-class Servants available in the initial release roster. He is a solid single target Quick-type Assassin despite his low rarity, and he can act as a competent fill-in for those lacking other single target Assassin options. His skill set is quite synergistic, allowing him to be a self-sufficient Critical Damage Dealer and Star Generator, while having a one-turn dodge for emergencies. His low rarity provides the benefits of easy access, low party cost, and lower costs for ascension and skill leveling. However, he does suffer from lower base stat caps in return, and is overshadowed by most higher rarity Assassins when comparing pure damage output.

His Rank Up quest improves his ability to perform as a primary Damage Dealer by adding critical star absorption to Knowledge of the Sowa. This is particularly useful for him as he does not generate stars on the order of ~50 per turn unlike some other star generators (such as Jack the Ripper) due to his low hit counts. Additional absorption will therefore help him capitalize upon those stars he is able to generate from his Quick chains, NP, or skills.

Overall, Sasaki Kojiro is a cheap, solid single target Quick Assassin who hits many marks for a critical damage dealer and star generator, and can be of great assistance to masters who lack access to other Assassin options.


Good Star Generation

Despite his low Quick card hit counts, both his Quick NP’s overcharge effect and his skill, Vitrify, can generate a decent sum of stars. He also has a triple-Quick card deck, and star generation boosts on Knowledge of the Sowa as well as from his passive skill, Presence Concealment.

Reliable Critical Damage

After Rank Up, Knowledge of the Sowa gives him increased star absorption of up to 500%. Mind’s Eye (Fake) also boosts his own critical damage by up to 40% for 3 turns. Combined with his good star generation, he can land critical hits reliably when he needs to.

On-Demand Evasion

With Mind’s Eye (Fake), he has some built-in survivability that allow him to tank an enemy’s NP turn or simply avoid potentially dangerous auto-attacks for a turn.

Ignore Evasion

Although it’s a niche form of utility, his ignore evasion skill lasts for 3 turns, so he may be useful to bring if encountering enemies that constantly use evasion skills.


Low Rarity Stats

Being one of the few one-star Servants in the game, his base stats are comparatively lower and he is outclassed by Assassins or Berserkers of higher rarity in terms of general damage output. This can be problematic as Sasaki Kojiro functions best when he is the center of attention, which can be hard to justify at times.

Low Hit Counts

His cards have relatively low hit counts compared to other more reliable star generators, and without Vitrify on hand, and with other Servant cards diluting the command card pool, he often won’t be doing Quick chains to maximize his star generation. In these cases, he may have trouble having enough stars to perform the critical hits that are essential to his damage output.

Craft Essence Recommendation

OVERALL: Sasaki Kojiro wants to unleash his famed Tsubame Gaeshi upon his enemies, and wants his critical hits to hurt. Given his three Quick cards and a Quick NP, performance boosts for his Quick cards are highly effective. Quick Up / Critical Damage Up Craft Essences thus work well with him.

  • Imaginary Around / Holy Night Sign / Knights of Marines: All of these CEs provide a Quick performance boost. Some have beneficial secondary effects, with Holy Night Sign providing a boost to critical damage. Knights of Marines provides some extra starting NP gauge to get out the first Tsubame Gaeshi more quickly.

  • Guda-O / Summertime Mistress: In order to support his critical damage output, these provide a boost to his critical damage. In addition, Guda-O boosts NP damage, while Summertime Mistress provides starting NP gauge.

  • Golden Sumo: This CE provides starting NP gauge and a boost to attack damage, which improves the performance of all his cards.

Level Up Skill Recommendation

Mind’s Eye (Fake) A: This skill is Kojiro's main survival tool, and also contributes to his damage output by boosting critical damage in conjunction with his Knowledge of the Sowa. In harder battles, this skill's usage should be more geared towards survival by evading heavy enemy damage turns, rather than boosting his damage output.

Vitrify B+: Vitrify is not an entirely bad skill as it provides flat star generation. Its best feature is the low cooldown (4 turns at maxed level) and that it improves his burst critical star generation. However it is not as crucial to Kojiro as his other two skills, and its secondary effect of mental debuff removal is not very useful in practice, and thus can be prioritized last.

A note on Vitrify’s “mental debuff” clear effect: this only works on charm, terror (Gilles de Rais (Caster)’s delayed stun skill), and confusion (Fuuma Kotarou’s skill seal effect). He cannot use skills when already charmed or skill sealed, so the effect is only useful for terror.

Knowledge of the Sowa B: This is Kojiro's best skill in terms of critical damage potential and reducing its cooldown will make him a consistent Critical Damage Dealer with good Star Generation. It is highly recommended that you max this skill first.

Suggested Servant Synergies

  • Hassan of the Cursed Arm: Kojirou isn’t too good at generating stars himself outside of his Vitrify skill and NP, so Hassan helps patch that weakness as a fellow assassin. Kojirou, on the other hand, is able to pierce dodge effects for 3 turns with his last skill, which is strong against boss Servants who spam Mind’s Eye or similar, which Hassan would otherwise be walled against, outside of the inconsistent instant death.

  • Gaius Julius Caesar: As a fellow sword swinging quick based servant, Caesar has everything that Kojirou could need, with Charisma, Military Tactics, and Incitement to boost Kojiro’us all around damage. Quick chains are more consistent given Caesar’s dual Quicks, while Caesar’s Busters can help out Kojirou’s damage with Buster command card leads.

  • Atalante: For those who want to ramp up the “Savior of France” shenanigans, Atalante’s powerful Quick buff allows Kojirou to unload a heavy dose of swallow slaying in an NP Quick Brave chain, as well as contributing even more stars for Kojirou’s crits.

Interlude Quests

Quest Ascen. Bond Reward
Chapter Completion: Septem
1 2
Rank Up 1
Chapter Completion: Chaldea Gate
4 0
✔ = Available ✖ = Unavailable

Servant Skills

Mind's Eye (Fake) A

Grants self Evasion for 1 turn.
Increases own critical damage for 3 turns.

Show Info
Crit Damage + 20%22%24%26%28%30%32%34%36%40%
CD 8 8 8 8 8 7 7 7 7 6

Available from the start

Vitrify B+

Removes own mental debuffs.
Gains critical stars.

Show Info
Stars + 567891011121315
CD 6 6 6 6 6 5 5 5 5 4

Unlocks after 1st Ascension

Knowledge of the Sowa B

Ignores Evasion for 3 turns.
Increases own critical star generation rate for 3 turns.

Show Info
Star Rate + 10%12%14%16%18%20%22%24%26%30%
CD 7 7 7 7 7 6 6 6 6 5

Unlocks after 3rd Ascension

Knowledge of the Sowa B++

Ignores Evasion for 3 turns.
Increases own critical star generation rate for 3 turns.
Increases own critical star absorption for 3 turns.

Show Info
Star Rate + 30%36%42%48%54%60%66%72%78%90%
Star Focus + 200%230%260%290%320%350%380%410%440%500%
CD 7 7 7 7 7 6 6 6 6 5

Unlocks after Rank Up Quest

Class Skills

Presence Concealment D

Increase your Critical Star Drop Rate by 4%.

Noble Phantasm

Swallow Reversal

Hidden Blade

Deal damage to one enemy.

Overcharge Effect

Gains critical stars.

Level 1 2 3 4 5
Damage + 1200% 1600% 1800% 1900% 2000%
Charge 100% 200% 300% 400% 500%
Stars + 15 20 25 30 35

Swallow Reversal

Hidden Blade

Upgrade via Rank Up Quest 2 (not available, ETA 2020/07)
Deal damage to one enemy.
Increases own Quick performance by 20% for 3 turns.

Overcharge Effect

Gains critical stars.

Level 1 2 3 4 5
Damage + 1600% 2000% 2200% 2300% 2400%
Charge 100% 200% 300% 400% 500%
Stars + 15 20 25 30 35

Ascension Materials


Skill Enhancement Materials

1 → 2 10,000
2 → 3 20,000
3 → 4 60,000
4 → 5 80,000
5 → 6 200,000
6 → 7 250,000
7 → 8 500,000
8 → 9 600,000
9 → 10 1,000,000

Unit Info

Star Info

Star Absorption102
Star Generation25.3%

NP Info

NP Charge per Hit (%)1.05%
NP Charge when Attacked (%)4%

Hits Info

# of Hits (A)2
# of Hits (B)1
# of Hits (Q)2
# of Hits (EX)4

Traits Info

Trait 1HumanoidTrait 6
Trait 2ServantTrait 7
Trait 3Weak to Enuma ElishTrait 8
Trait 4EvilTrait 9
Trait 5Trait 10

Death Info

Instant Death Chance55.00%

Other Info

Release HistorySince Launch
AKAs/Aliases/(Fan) Nicknames (Fake) Assassin, VIVA LA FRANCE, SAVIOR OF FRANCE, Gate Keeper, regend
AlignmentNeutral Evil
Country/Place of OriginJapan
Seiyuu (CV)Shinichirou Miki
SeriesFate/stay night