Summary[]
Lightning strikes, He can react right then and there.
Calculation[]

Yujiro's Arm Length = 120 px = 83.4 cm
Moving Straight Distance = 267,5 cm
Moving Vertical Distance = 95 px = 66 cm
Yujiro's Total Move = 267,5 + 66 = 327,5 cm
Using the assumption that lightning is at least 1 meter away
Projectile Dodging Method = 327,5 x 440.000/100 = 1.441.000 m/s = 4.201 mach = MHS+
Conclusion[]
327,5 x 440.000/100 = 1.441.000 m/s = 4.201 mach = MHS+