He taught me how to calculate the geometric mean.

He fractured his metatarsal bone.

The Second Sino-Japanese War was a war that lasted from 1937 to 1945.

This shop is currently open.

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 Yasakani no Magatama is a divine artifact that appears in Japanese mythology.

The Twenty-Eight Mansions is one of the constellations used in ancient Chinese astronomy.

Octans is one of the constellations in the southern sky.