How can you tell it's 1/6th Mark? obvious answer is you can read Japanese of course. Google translate didn't translate enough for me!
No, I just clicked on the date of the initial clip (2019 Rd2 8/31) and scrolled down.
The second clip was on 16th February 2019
I only dug deeper because I couldn't believe that a NA L series could power a non-spaceframe car to a mid 8 second quarter.
Robbie Ward's (RIPS) car at 1300kgs, needed an RB26/30 with around 1400bhp to do a 7.86 second pass.
The RB will be heavier than the L series but the Rising Z car still has lights, indicators, etc.
Even if it was 1000kgs without the driver it would probably still need over 800bhp to do an 8.668 sec.
Don't get me wrong, this L series must be making phenomenal power to run mid 10s!