What is the symbol of Shintoism?

The religious symbol of Shintoism is the Torii gate. The online resource Religious Symbols explains that the Torii gate is representative of transitioning between the finite world and the infinite world of the gods.

The Torii gate symbol is used to indicate entrances to sacred spaces. Shintoism emerged in Japan in 660 B.C. It remained the official state religion of Japan until 1945. According to the BBC, Shintoism is not typically regarded as a religion in Japan, but more as an aspect of Japanese life. Due to an emphasis on ritual within Shintoism, it has been able to co-exist with Buddhism in Japan for hundreds of years with no conflict.