Japan does not have an official religion, but it follows the traditions and holidays of Shintoism, Buddhism, and Catholicism/Christianity. JAPAN ROCKS!
Konichiwa!
It is estimated that 93% of Japanese practice some form of Shinto.
Shinto.
SHINTO was the official Japanese religion (Emperor Hirohito was Japan).
Shintoism begun in the year 500 BC in Japan. Shintoism had no specific founder but it eventually became the official religion of Japan.
Japan and some of Cambodia. Not to mention there have been Countries in North and South America, Europe, and Australia to build Shrines for the Shinto religion. http://shintoreligion.wikispaces.com/Shinto-Origins
Shinto is/was the official language of Japan.
No one; from what I have read, it evolved with the people of Japan. Shinto(ism) also has no official formalized system of doctrine or sacred texts. There is debate on the time period when Shinto originated,
The Japanese Yen is the official currency of Japan.
Japan doesn't have an official animal.
Islam is the official religion in Afghanistan.
There is no 'official' religion in the USA
Theres no official religion in Tanzania. The government do not have religion, the citizen do have.
The oldest religion of Japan is animism. Then came Shinto.