Introduction[]
I will be calculating a Kakashi feat in original Naruto
Feat[]

Data Book 1 states the reflection is light speed

Data Book 1 once again states the reflections are light speed

Haku uses mirror to reflect (Viz)
Haku intercepts kakashi’s Chidori. Haku who is stated to use his mirrors reflections to travel at light speed. While using a mirror to transport Kakashi moves to stab Zabuza and ends up stabbing Haku.
Here in the official Dub for Naruto Haku stated he transports at light speed and sees sasuke and naruto in slow motion.
https://cdn.discordapp.com/attachments/706148374574792794/707696647391674428/video0.mov
Calculation[]
https://cdn.discordapp.com/attachments/576638638817935360/653357620748353572/unknown.png
zabuza = 35 px = 1.83 m panel height = 387 px 2atan(tan(70/2)(35/387)) degrees = 7.2469782439 Distance = 14.449 m T= d/v T= 14.449 / 299792458 T= 0.0000000481966761 seconds
https://cdn.discordapp.com/attachments/576638638817935360/653360477296001034/unknown.png
zabuza = 124 px = 1.83 m distance = 326 px = 4.81112903226 m s= d/t S=4.81112903226 / 0.0000000481966761 s = 0.3329731492681514 c
This would mean kakashi’s striking speed is: 33% speed of light (0.33c)
Conclusion[]
He doesn’t improve his speed much even by Shippūden, an Edo Haku can still out speed him, practically repeating the feat. I’m aware that some will either see this as an outlier or not accept Haku’s ice mirror travel as light speed. But I plan to make a thread to prove the high tiers are light speed. Based on this video https://youtu.be/jbGA_UhJA50 Relativistic kakashi