The Ashikaga era is a part of Japanese history.

The Asuka Period is a part of Japanese history, a time when culture and arts greatly developed.

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

The Kamakura period was a very important time in Japanese history.

The Renaissance era was a time when art and science greatly developed.

He succeeded very much.

This area has been rapidly developing in recent years.

This area has been developing rapidly in recent years.

The Paleolithic is the first era of human history.

The Bronze Age was an important period in human history.