Shinto organization
The was an organization under the Ministry of Religion in the Empire of Japan.
History.
It was founded in 1872 to train "kyōdo shōku" or religious teachers because the Missionary Office and Department of Divinities were unsuccessful in their national indoctrination objectives. It was intended as a joint Shinto and Buddhist organization, but ended up becoming entirely dominated by Shinto.
 were established in each prefectural capital and were established in various cities.
On January 1, 1875, an arson attack on the Great Teaching Institute caused confusion, with four Jōdo Shinshū sects informally announcing their departure from the Great Teaching Institute.
On May 3, 1875, the Great Teaching Institute was dissolved by the Ministry of Religion and was succeeded by the Bureau of Shinto Affairs and later Shinto Taikyo.
Ame-no-Minakanushi was one of its patron deities, also known under the Buddhist name Myōken. 
The "Great Teaching" is the same word that is used in the "Great Doctrine" or Proclamation of the Great Doctrine, and Taikyo in Shinto Taikyo.
References.
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