Status Report: Japanese Tiger armor thickness issues
Thank you Denam Y.
a post in the NA forum was brought to my attention and looks like the Japanese Tiger was not exactly manufactured with Japanese precision. Large parts of the mantlet are 0mm thick - the area behind them is covered by the 100mm frontal turret armor itself but a small area to the left of the 0mm zone only has the 0mm hole behind it, making the frontal turret very easy to penetrate.
I went even further and got my investigating feet in a training room and made a video to show you how easily the tank and its crew get wrecked with HE:
Have a good day!