The Ashikaga era is a part of Japanese history.

The ruins from the Kofun Period are important for a deep understanding of Japanese history.

The Muromachi period is a part of Japanese history, a time when many cultural changes occurred.

The Heian period was a time when Japanese culture developed greatly.

The Edo period in Japan was a time when culture and art greatly developed.

Life in the Stone Age was greatly different from today.

New age technology is greatly changing our lives.

The ruins of the Iron Age are an important clue to understanding the life of that era.

The stories of the Heroic Age in Greek mythology always fascinate me.

This town once experienced a golden age, achieving many advancements and accomplishments.