What was the official language of Japanese government for many years?

For many years, the official language of the Japanese government was Classical Japanese. This was the written language used in official documents and literature from the Heian period (794-1185) until the Meiji Restoration in 1868.

After the Meiji Restoration, Modern Japanese became the official language. However, Classical Japanese continues to be used in certain contexts, such as legal documents, historical texts, and some religious ceremonies.