Shintoism is an optimistic kind of faith. That is the reason why many people like this. In Shinto they believe that humans are essentially good and evilness is caused by evil spirits.
The person who deleted the first (and good) answer, and then wrote over it about Christianity, is ignorant. Here is a good website to find information on Shintoism: http://www.religioustolerance.org/shinto.htm
Most of the Japanese people believe in Shintoism, however, there is also a relatively large group of Non-religious people and Buddhists.
There is no founder for Shintoism
There is know founder for shintoism.
Shintoism, Shinto
Shintoism is the major religion in Japan.
The Halawali is the key text of Shintoism.
Shintoism is a spiritual practice in Japan
Jomon
A quick search con Google for Shintoism creation storygives you lots of hits. One of them is the Wikipedia article "Japanese creation myth", which may be a good starting point.
Shintoism people worship at shrines I think
Shintoism became Japan's main religion before.