Martial Artist. If Yasuke is not wearing any armor or holding a shield, then his AC becomes 10 + Dexterity Modifier + Wisdom Modifier.

Ki Warrior. Yasuke has 6 Ki Points he can expend in order to perform various attacks.

Multiattack. Yasuke makes two unarmed strikes per attack action. If an enemy creature is more than 5ft away from him, he can also attack with a kunai.

Unarmed Strike. Melee Weapon Attack: +7 to hit, reach 5 ft, 1 target. Hit: 8 (1d6 + 5) bludgeoning damage. 

Kunai. Ranged Weapon Attack: +7 to hit, range 30/90 ft, 1 target. Hit: 6 (1d4 + 5).

Flying Kick (1 Ki Point). For one of his unarmed strikes, Yasuke can force the target to make a DC-15 Dexterity saving throw. On a fail, the target is pushed up to 20ft away from Yasuke and falls prone.

Flurry of Knives (1 Ki Point). Yasuke attacks with up to four kunai either at the same target or at different ones.

Disarming Strike (1 Ki Point). After making an unarmed strike, Yasuke can force the target in the same attack to make a DC-15 Strength saving throw or be disarmed on a fail. The weapon lands a number of feet away from the player equal to the roll of a D12, the direction being decided upon by a D6 (1 being north, following clockwise).

Stunning Strike (1 Ki Point). Yasuke can interfere with the flow of Ki in an opponent's body. When he hits another creature with an unarmed strike, he can force the target to make a DC-15 Constitution saving throw or be stunned until the end of his next turn.

Flurry of Fists (1 Ki Point). Yasuke makes two more unarmed strikes. They can be aimed at the same person or at different targets.

"Get Over Here!" (1 Ki Point). Upon attacking with a kunai, Yasuke can channel his Ki into the small, mystical chains around his forearms and link a chain to the thrown weapon. Upon a hit, the target must make a DC-15 Dexterity saving throw to pull the weapon out or be knocked prone and dragged up to 25ft toward Yasuke, taking an extra 2 piercing damage for every 10ft they're dragged.

Redirect Weapon (1 Ki Point). If Yasuke is hit by a melee attack, he can reduce the damage taken by 1d10 + 10. If he reduces the damage to 0, then he can redirect the attack to another enemy target within 5ft of him. The new target takes the full damage of the enemy attack. The new target must be within 10ft or less of the original attacker.

Deflect Missiles. If Yasuke is hit by a ranged weapon attack, he can reduce the damage taken from it by 1d10 + 8. If he reduces the damage to 0, then in the same reaction he can expend 1 Ki Point to make a ranged weapon attack with the missile.