He is learning Ancient Greek language.

The history of the Empire of Japan is very interesting.

Old Church Slavonic is the oldest recorded language of the Slavic group.

Old Church Slavonic is the first language written by the Slavs.

The Empire of Japan, written as 大日本帝國 in Kyūjitai, was a nation that existed from 1868 to 1945.

The Imperial Japanese Army was a Japanese military force that existed from the Meiji era to the Showa era.

The Imperial Japanese Navy was once the navy of Japan.

The Japanese Society for Rights of Authors, Composers and Publishers is an organization that protects the copyrights of musicians.