Gojo Satoru is tall and he doen’t look very Japanese.
In an official setting, Gojo Satoru’s height is over 190cm. The other characters who have the same height as Gojo are Todo Aoi and Panda. They all over 190cm, though Panda sempai is not a human.
For your information, the average height of Japanese grown men is about170cm. Compared to that, Gojo is very tall and he doesn’t look very Japanese.
Actually, I think he would be easy to notice in the crowd if he walked on the street. A man of over 190cm height is rare in Japan.