Ikki is my best friend.

Shiki is my best friend.

The official discipline governing this country is strict, and severe penalties are imposed on lawbreakers.

He is managing my assets.

Reading the Nihon Shoki allows you to understand Japanese history more deeply.

The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 251 million years ago.

At what point in Earth's history does the Triassic period fall?

The Silurian period is one of the geological eras.

The Quaternary is the most recent era in Earth's history.

The Devonian period was a very important time in the history of the Earth.